1.There is a lot of things that don't stack that should stack logically (I won't list all of them because i don't want to but feel free to add to my list and maybe I'll edit the post later (don't count on it)):
- -Leaves (If you are so worried about silk then make all the leaves but the mulberry ones stack, i will just hide those trees then)
-Barks
-Coal (I don't care that it will break some bots used to fill smelters)
-Wax (Can't you just lump it to together? Maybe make it something like ash/cavedust instead of stacking)
-Toads, frogs, crabs, and probably many others (If fish can stack why not them?)
-Bones other than the basic ones
-Cloth
-Leeches (And make them able to stack on you, it'll be funny when people die to them)
-Reeds
-And those are just the ones i noticed during my hermit testing runs, probably there are many more i would notice if i actually played since they were added
3.Make it so you can shoot using ammo from stacks, will be really annoying to get bit by an adder just because i forgot to unstack my stones early on.
4.Make stacks work with portable containers, most relevant is the wicker pickers (Why would you waste a hand slot to get equivalent of 4 inventory spaces), but i'd also add creel to it (although it has some use due to unstackable fishing stuff and not wasting hand slot).
5.Why can't we make stockpiles from a stack? And why can't we just put a stack directly into a stockpile (or as much as it fits). I literally refuse to work with stockpiles now since they are basically inferior to a wooden crate in most cases (Maybe just make them work like unliftable containers that disappear once empty? At this point i wouldn't even mind that since they'd still be worse than a crate).
Edit: Will add things mentioned by others:
6. Plant crops from stacks
7.Allow people to right-click stacks to just eat one food from the stack (for fruits and stuff) without having to go through UI, could probably do this for a lot more actions like "study" and so on.