'If you are using Damus though that feature was removed because Apple couldn't take a cut.'
This means zapping is essentially at a dead end for Nostr. It will almost certainly never take off, since a LOT of people use apple iphones/macs. (at least in the western world). It won't kill nostr but it is a major setback that can not be overcome if the owners of one of the worlds most used operating system won't allow it. Apple also prevented bitcoin from becoming more popular. It makes one realise how powerful one company can be when it comes to global politcis and global finance.