This is a quality of life improved for the game but as 100 stacks, I don't know if that's actually considered fair gameplay. Items that are currently stackable in 100 stacks are: AquaSphereVortex CubeNeutrino ModuleDimension Matrix Gravitino BallMicrodensity FabricDynamic ResonatorCrafting module to upgrade Exosuit, Multi-tool or Starship which requires more than two of these items then dismantling them allowing to stack that item 100 times. As what comes to Atlas Stones I am quite astonished that their not in stack of 10. Also when you get later into the game you can unlock to craft other items that aren't green highlight like: Suspension Fluid, Granite, Crolium, Terumin, Aronium, Lemmium, Magnox & Herox. For fair gameplay I don't think items should have more than 10 items per stack, obviously people want more but at 48 slots + 48 slots ship. I think that would be fair enough, and you can have multiple of 10 stacked items in hand if you actually want to hoard them. Currently I am still struggling with maximum amount of slots being used part of having 10 Atlas Stones their own slots. Though remember that I have maxed out Exosuit & Starship upgrades so it also takes fair bit of space. (25 slots open exosuit & 18 in starship) But like having 10x Warp Cell stacks and maybe multiple sets of Dynamic Resonators for those that want to travel via Black Holes. I would think it would be fair enough. TL;DR Kinda actually exists already, if please somebody could make this as feature that would be great.