You miss the point. The real question is "which wallets are left that don't handle Cashu payment requests?"

The answer is "most of them".

If I want to pay using private Cashu ecash, and I'm taken to my default Bitcoin/lightning wallet and it doesn't support Cashu, or I've got to cliek around to find the correct payment request, then that's a really shitty UX. Worse than offering it as a payment option in-store IMO.

One day that may be different, but that day is not today. BIP(3)21 makes for great UX, and I salute you for writing it, but only when wallet support for the underlying payment option(s) are ubiquitous.

Store checkout options will therefore (rightly) lag behind wallet adoption.

There's also a reasonable argument to be made that Cashu payments should always be a separate option. Like cash, it's a bearer asset... no "wallet" required. Clicking a BIP21 link potentially doxes the user's intentions to the wallet.

> So you’re saying no normies will ever use Cashu? Boy why are we bothering with it then.

That line was not sarcastic? OK chief 🫡