tl;dr: Frustrated with Google's direction on AOSP (Play Services tracking, locked bootloaders, restricted sideloading), the author is migrating from Android to Linux on their Fairphone 4, settling on SailfishOS over Ubuntu Touch and postmarketOS. SailfishOS offers nice gestures, SSH access, and solid Android app support, but suffers from outdated Python/glibc, broken Waydroid/GPS on the FP4 port, and low-quality community apps. They'll keep a Galaxy A17 on standby for banking and Uber apps that can't run on Linux, and are considering buying a Jolla Phone 2.