Easy UX != simple UI, it means things "just work". Do all 100 wallets interoperate seamlessly with the other 100 (10k combinations)? Certainly not. That's my point — not that routstr didn't work (it did), but that it's crufty UI reveals the underlying complexity that leads to poor UX. We can agree to disagree, I don't expect to convince you. But I do think you need to take this problem seriously in order for cashu to succeed (and I think you do, you just seem to treat people bringing this up dismissively, which is weird).