350
Fairphone 4—the repairable, sustainable smartphone—is coming to the US
(arstechnica.com)
Technology for a Solar-Punk future.
Airships and hydroponic farms...
For what it is worth, at least for Fairphone 3 the support in, e.g., LineageOS is excellent and I recently updated to LineageOS 20 (based on Android 13).
That said, I would hope that Fairphone does make at least one more major update of their official Android version for Fairphone 3.