> And yet, the vast majority of transactions on the LN proceed without a problem, and further improvements like AMP will further reduce the number of failed fees. Another option is to make an on-chain transaction.

Oh that's funny. While you're right that payments failing for not finding a route is a big problem, it's not even the real problem with routing.

The problem is for LN to function at scale, it have to centralize around a few big hubs. Because otherwise routing is impossible, and transactions will fail.

Decentralized routing is an intractable problem, and LN have to choose between centralization and scaling.