These are all chains that support smart-contracts, meaning that services can be built on top of them! I don't know much about the DeFi ecosystem on other chains, but all of them should have at least _something_ going on.
None of them have critical mass because none of them are scalable.
So no, actually, they don't have very much going on at all.
It's trivial to solve one single aspect of the much larger problem by deciding to punt on solving other extremely crucial aspects, like scalability, or decentralization.
