This. Even if Nostr issues are completely solved, there are still tons of other issues with mobile platforms. Complete lack of privacy is probably the biggest issue, but there are also many limitations and controls on what you can and can't do with phones. The fact is, you are paying for a computer+radios that you don't really own and have very little control over. Android + GrapheneOS is a partial solution, but it's difficult and there are still issues with the base hardware. There is no easy solution in the mobile space and it's not clear that anyone really wants one.