"Nothing is so permanent as a temporary government program"

And so it will be with Nostr Zaps. "Eh, it works so I'm not going to bother changing it ever."

Unfortunately I'm very confident years from now that the reliance on custodial zapping will look much the same as it does today.  

 I believe this will change over time. With multiple client devs looking at this problem differently, there will be multiple solutions.