Do you really believe that bitcoiners are using custodial nostr apps only because the interactive push payments?

The custodial apps all offer better UX across many aspects: free, no upfront capital cost, better routing, ongoing liquidity management, etc. 

If there was a current problem, and we needed non-interactive push payments, we would see many people using Mutiny and using offline receipt and forwarding services. But we don’t because Mutiny was the best non-custodial app I’d seen but still didn’t have product-market fit.

Said another way, if we snapped our fingers and solved the push payments tomorrow, we still would have almost nobody using Mutiny. Lightning’s UX issues are much bigger than that.