I am surprised at the negativity still floating around about this change. I started using Vortex while still in the alpha stage. Had a few hiccups, but got over them. How did I get past them? I researched answers to my questions. Nexus and GamerPoets has some great videos. Plus, I Googled for other answers.
I am running 417 mods and my game is stable. NMM was never this stable. BUT....if you want to stay with NMM there are updated versions on GitHub, I used to go there before I took the leap of faith with Vortex. If nobody can change the API in NMM for downloading then you will have to download and install manually. It is not hard.
Remember, everything on Nexus is free, quit acting like you took out a loan to use this service. I imagine at least 50% of those complaining have never donated to mod development, or paid to use this site. I put you folks in the same category with those who don't vote and yet *censored* about how things are ran.
Again, I thank Nexus and the Vortex team for moving forward towards better stability.