Simple with Sparrow, clients etc and are Wasabi, Payjoin, BTCPay, can Cake Async all with Mobile Payjoin so BullBitcoin payjoin backwards-compatible

Backwards-compatible Payjoin usage is still synchronous and so requires both parties to be online at the same time

Are there videos out there of payment workflow? I'm still having trouble imagining how the transactions are built.

Dan, how can we, as plebs, - push so that Payjoin would become the standard in all wallets? Will the wallets devs be receptive to a Nostr launched and amplified awareness campaign around Payjoin?