Smartphones(android, iphone) is just smart OTP now. Bootloader unlock unavailable(i hope this is just security concern for AI era), attestation is now a thing(regulations?). Most application(incl ChatGPT, X) says Android-available, but in fact it's Google-Android only.
As daily driving Linux desktop/laptops, I mostly find that android(at least samsung galaxy-flavored) is next gen of Microsoft Windows, in bad ways. At least you can "hack" the Windows to customize something by your own, android does not. Performance also questionable nowadays, not for gaming but browsing purpose for me, may drain more battery than expected. Also MS acknowledges the issues and made statements to fix while I haven't seen samsung's.
Anyway, My opinion is, If you are nerd like me, I would buy one phone that
1) can unlock the bootloader
2) can root
3) at least kernel source available, some companies do not disclose until legal? actions
4) optional, linux port-able (via community)
5) optional, officially supporting linux(not aosp)
and then buy second phone, that has great security support, e.g Apple iPhone or Google Pixel, and use it like a wallet(banking/cam/gps/... I would not like to support other vendors, what if they abandon security patches, and then phone being vulnerable). I believe more android application will be more restrictive than before in the future.
For linux, you own the hardware. Because it's open source, you can audit and harden the every aspects, e.g You might able to use proprietary bluetooth codecs, which vendor disables in android ROM. When AI era, you may able to investigate and mod stuffs which you don't fully understand. This take risks, and we have right to take the risks instead banning it.