Fyi
I think it's the "send btc via email" feature. That's new and makes it very easy to send/receive payments beyond the btc/LN niche we are in on Nostr. Once LN and possibly other fiat on top of LN is implemented, sending money p2p will be more easily accesible by mainstream. That's also what I understood from Proton CEO in his recent interview https://youtu.be/gUGJje2jvck?si=zGVUkX_k_XTXbqfp
Discussion
Thanks for the useful information!