I don’t think it’s as fast breaking as you suggest but certainly big changes like 32Bit support dropping, OpenGL deprecation, and move to arm64 are huge breaks.
Generally their “availability” macros in swift and objc keep things working across versions in a forward compatible way.
Jolla has been selling on real hardware since the Nokia N900 of which it's a direct descendant. That platform has been shipping for 20 years. It's been around longer than iOS or Android. What on Earth do you mean "vapourware"?
I have 2 handsets here currently. It is completely real.
Are there any made in the last 5 years? I too was a huge fan of Maemo but where can I buy hardware made in recent years that runs this as well as my Maemo experience in 2008?
“Don't only hang out only with stronger students.
Weaker students will have you explain things to them and you will find that teaching the material helps A LOT with understanding.”