LN isn't broken, BTC is broken. LN is a great idea with major advantages for certain use cases. It's just that, ironically, it only works well when network fees are quite low.
As I've been saying for years: LN should be implemented on BCH, where it will actually work. It was never designed to replace a non-functional Layer 1, only to augment it.
BCH has little need for LN right now, but if BCH were adopted on a large scale, that would change. LN is great for very small (particularly recurring) microtransactions.
