Fairphone provides very poor updates much worse than iPhone, Pixel, Samsung flagship or many other devices. They lag far behind partial backports of security patches to older releases of Android. They lag a year or more behind full security patches which are not all backported to older Android releases, similarly to iOS. Fairphone 5 and earlier have an end-of-life kernel without security support and the same fate awaits the newer devices.
Unlike AOSP, SailfishOS has a largely closed source user interface and application layer. They still have their own UI and application layer so it's strange to portray Android using a different one than desktop Linux as a problem and a closed source alternative to it as a solution. SailfishOS drastically reduces privacy, security, usability, battery life and app compatibility compared to simply using AOSP. It's not possible to build a project like GrapheneOS on top when so much of the OS code is closed source rather than only many mainstream apps people want to use.
> Fairphone provides very poor updates much worse than iPhone, Pixel, Samsung flagship or many other devices. They lag far behind partial backports of security patches to older releases of Android. They lag a year or more behind full security patches which are not all backported to older Android releases, similarly to iOS.