They will just make being a lightning service provider illegal which will shut down the majority of the big nodes and since lightning is so damn difficult to use it will die pretty much immediately. Monero fixes this at the Layer 1.
Discussion
Once I can buy/sell #Bitcoin directly using Monero I'm in - until it's truly integrated into Bitcoin, no go.
Do you mean like atomic swaps? That's already a thing if that's what you mean. Where you can just switch back and forth between them as you need.