Sorry- no 'modding' EVER in Fallout:76 in the sense anyone here means. At least 'officially' as opposed to hacking into the game (as some are doing today).
Here's what Todd Howard has stated in multiple interviews (recent).
1) By 'private' server, Beth means a server RENTED from a Zenimax server farm, NOT server code running on your own PC.
2) By 'mods', Beth means BETH code downloaded from the Atom Store that changes the gameplay on the 'private' server. For instance an Atom Store 'mod' that you PAY to add 'battle royale' mode to that server you have rented.
The ONLY relation Nexus mods have to this concept is that Beth MIGHT steal some more of the best modders from this site to work on Atom Store 'mods' (where once again such devs would be the lowest paid in the AAA game dev biz- how Todd loves that fact).
Oh, you say- but if the dumpster fire that is Fallout:76 continues its downward spiral, won't Todd be 'forced' to give in to our demands? Sorry, this is the most naive ill-informed opinion possible. This is not how AAA devs work. Ask the many teams that tried to continue supporting defunct games from other publishers, and then had their work shut-down after legal action from those publishers. Beth will seek to maintain complete control even over the rotting corpse of Fallout:76.
There are two scenarios left for Fallout:76- either the revenue from children and vulnerable adults spending hard cash on the rubbish in the Atom Store gives Zenimax an acceptable rate of return after it goes F2P OR Beth shutters the entire project after an 'acceptable' period (which in this biz tends to be a couple of years for mega flops). The 'proof' of Beth's 'faith' in this 'game' will be future 'DLC' releases in 2019 (major new content). If all one gets are sad pre-coded stuff like the 'vaults' 'opening', then Beth has already accepted the game is dead.
So what can Nexus modders do in the meantime.
1) go back to Fallout 4 and give up on the idea of modding a multi-player game.
2) Think of a 'great' mod idea and directly pitch it to Bethesda in the hope they'll "employ" you to make it for their Atom Store.
There is a third alternative, but that is to hack Fallout:76 regardless, and be part of a movement that acts to take the game away from Beth control. But believe me, Nexus won't support this work- Beth will issue legal take-downs even if the game has at that point near zero sales- and hacking when a corporation paints a target on your back has become a very dangerous pasttime in the last few years.
Look, people like me painted a 100% accurate picture of what Fallout:76 would be a day after the E3 reveal- and then pointed out the significance of each of Todd Howard's post announcement statements. The ONLY thing I said that proved not to be true was the idea that you could not play with other selected people.
Even here I did NOT get this wrong. It was Todd Howard's demand all along that you always played with randoms. He wanted this for many reasons- to FORCE emergent role playing- to PROHIBIT teams of power players from stroming thru the game in a day- to PREVENT the random instance of the gameworld you get everytime you log in from being a major downer.
In the end even Todd could not persuade the company to not implement a traditional lobby mechanism, so you CAN play with 'friends'. But that wasn't the idea until very close to the game's release.
Anyway my point is that the naivety shown in this forum is amazing. People still willing to ignore reality after all that has happened and been said. For heaven's sake, I even saw a vid from the lead of Sim Settlements yesterday talking about his modding plans for FO:76. Not only is this time wasted on an utterly fruitless path, but when ther truth stick finally hits you people, you'll likely just give up on all Beth games altogether in disgust. And that would be a real shame.
I get that Fallout 4 lacking multi-player SEEMS to make it a sadder modding target now- but think about just how poor and pointless the multi-player proved to be in Fallout:76. This genre of games just doesn't suit mutli-player. And you cannot bang into the ancient engine good multi-player concepts.
Could there be a GREAT mutli-player game in the vein of the Fallout IP on a new, better engine from another publisher? Of course. But this is not what we have in any way from Beth. Modding a Beth game needs to play to its strengths, not play a game of 'let's dream'.
And if you ignore multiplayer, what does (in theory) FO:76 bring to the table for modders- absolutely NOTHING- a backward step in every way over Fallout 4's now very well supported use of the creation/gamebryo engine. A 'new world' you say? Well didn't Far Harbour and Nukeworld also introduce 'new worlds' yet I did not see Fallout 4 modders rushing to take on those new areas just cos they were new.
The 'dream' of modders 'fixing' FO:76 is just that- a very silly and utterly refuted PIPEDREAM. FO:76 was built from the ground up to be walled off from the Nexus community BY DESIGN. Todd, as he has screamed from the rooftops, wanted ALL 'new' content for FO:76 to be monetised to the max- with all monies going to Beth. As far as Todd has always been concerned, free third party mods steal the very bread from his mouth.
Want a true flavour of Beth's 'thinking re:FO76- go to the Reddit FO76 subreddit (NOT the Fallout one). The FO76 subreddit is fully controlled by Beth (their creation, their moderation lead) and is one of the foulest things I've ever witnessed online. The groupthink that Beth orchestrates there is missing from even the most niche cult games on Steam pages. The FO:76 community is the very opposite of healthy.
In comparison, Fallout:4 is a nice quiet backwater, disowned by Beth after the flop of Fallout 4 VR (and the fact that the very inefficient game ports badly to current 'mobile' devices unlike Skyrim). Beth's last concern with Fallout:4 is ripping console users off with further Creation Club microtransactions- and even that must be fading rapidly now that FO:76 is out.
For Beth, if the Fallout IP has a future, it will be in some Fallout Infinite mobile trash which is but yet another reskinned product from one of the Chinese giants. I now firmly believe Beth will never again release a new traditional open world title. They just do not have anywhere approaching the technical ability to make something acceptable in the future, and while Todd Howard still runs the company, they cannot change.
And for the tenth time I say that leaves us with what Beth has already released with modding tools, ie., Fallout 4 and earlier. Which is not as we would have it, but still a lot better than nothing at all.
Todd's "jam tomorrow MAYBE" is really "cr-p tomorrow at best". Nothing worth waiting for, and certainly nothing worth planning for.