Comment by Aachen
19 hours ago
Okay that's six: the ones I forgot are iodéOS and Postmarket (possibly the most popular Linux mobile, idk how I forgot about them), plus Shift's own custom OS which I'll count as two because there's a googleful and a googleless variant which is a relatively significant change, plus LineageOS and e/OS which I had mentioned. That's a lot of choice indeed! Thanks for the link
SailfishOS is another popular mobile Linux distro you should be aware of - it's been around for a long, long time - in fact its heritage can be traced all the way back to Nokia's Maemo OS (circa 2005), which became famous in the community with the Nokia 900.
And then in 2010, Maemo merged with Intel's Moblin to become MeeGo (featured on the Nokia N9). The MeegGo engineers who were let go (due to Nokia x Microsoft) then created Mer, and eventually started a new company called Jolla, who created SailfishOS based on Mer.
It's been 13 years already since SailfishOS was out, and if you include the Maemo heritage, it makes it the oldest surviving mobile Linux distribution.