In the coming years, block space is going to get very expensive and people will get onboarded directly into layer 2 protocols - Fedimint, Lightning, Ark, cashu, Liquid etc. It is important that there is interoperability between them i.e swaps between all protocols with minimal fees to avoid them becoming their own silos and to increase their resiliency.

I read a recent article regarding the same. Give it a read. https://blog.blockstream.com/increasing-interoperability-between-bitcoins-second-layer-protocols/