I agree with this so much. It would be so convenient if I could just flash Arch Linux or something onto a modern smartphone and be able to use all the applications and settings and data I use on my desktop, but on my mobile phone. Android is markedly better than iOS when it comes to customization, but it's a far cry from a (real) Linux distribution. I've started getting OS-level push notification ads from Google News and other bullshit on my Samsung Note 9, and it makes me want to set the thing on fire.

It also makes me pretty pessimistic when it comes to privacy. I can uninstall Windows/MacOS on my laptop, coreboot it, use FOSS/privacy-centric software, etc. but it doesn't really mean much when my phone (which is basically attached to my body 24 hours a day, and is my main conduit of communication with others) is a privacy/security nightmare.