hi, @Tentos,
thank you for your experience.
So, at a very basic usage, /e/-OS-level-s official or community would be enough, as far as there are some security-updates. gs290-e-os-life
I would like to keep a phone at least 5 years. Here, I look also how to replace the gs290 in the future.
On 2015, I got a firefox-OS-phone, and used-it until 2021, without any updates after 2017, but without problems at a very basic usage.
Now, mobile phones became indispensable advanced smartphones for every-day life.
thanks; Brieuc.