With the default configs (and maybe other internal terrain gen settings), caves like the Foglorn Hollows can be really small and basically split apart by a hundred blocks. It also happens with Toxic caves, but it's issue is mostly that it's to split apart to travel through and not it's size. With how rare the caves are, I think it would be more fair to have bigger and more traversable ones. I haven't really seen the issue with the other caves, especially the primordial caves.



Most of the time it's fine and spawns very decently sized caves.

dupe

Yup, just noticed and it was about to close it myself.