This little thing we have called the EU inner market is pretty neat… it is definitely available elsewhere.
And i don’t follow what you mean “bad for the environment”, SFOS gets updates much longer than tghe Android it ships with.
This question is pretty much a duplicate of this.
Currently it is not known what will come. Jolla probably has a bit of a plan and some ambitions, but if e.g. the Xperia 10 III proves to have some serious hardware or other issues with e.g. the proprietary drivers, we might get something else instead. And regardless, it probably isn’t soon, as in a few months.