I’ve been using Linux and Graphene for a long time and welcome all third party OS phones not controlled by Google and Apple. Jolla never marketed theirs in the USA and it always seemed more like a prototype phone for hobbyists more than a daily driver (same as all of the others).
This will probably continue to be the case until someone with deep pockets in the USA does a deal with a friendly phone OEM who makes a decent quality product and a mobile OS group who can make it at least as user friendly as Android. Considering the Byzantine labyrinth that Android’s user interface is today, the last part should not be that difficult.
Nano’s used because it’s easier to use, which means the user interface is more intuitive than the others who insist you hit a key before making an edit.