devs are in the process of making lightning 2.0 (layer 3)
its where you dont vault up funds into a channel. but instead deposit funds into a factory multisig
the factory then offchain creates channels below it in millisats.
so users cant broadcast, but can close session with the factory and so the factory aggregates the channel balances and recreates new channels to rebalance the channels.

thus even less onchain transactions as it wont require onchain broadcasts/settlement to close/reopen