Yes, payment channels have many use cases, even centralised routing though a single hub is not so bad for certain use cases. But is LN exclusive to BTC?
No it isn't, that's why what they are doing is a very stupid approach for their coin's survival. And yes I agree: in some cases centralization doesn't matter much, though we.....
For stuff like game play where you deposit funds to use in game, although no real routing as just 2 tx with main hub, but tokeda does this better with token issuer adjusting balances
Exactly, if LN can be used by multiple coins, why is BTC needed? They will just start accepting alt X (fiat tokens) to open channels cheaper than on chain BTC fee & then why use BTC?