Shoutout to fairphone who actually updated the firmware themselves, surely a loss leading project, but a very respectable dedication to end users.

I am not sure how much of a shout-out they deserve. For example, Fairphone 4 is still supported until this year. They ship with firmware from 2023 and with a kernel patch release from 2024. Every one of their phones is full of holes because their software lags so much.

Even on their most recent model, they are frequently more than a half year behind firmware updates, ship 1-2 year old kernels, and are late with major Android releases (meaning you miss out on security patches not classified high/critical).

Good examples of software longevity are iPhone, Google Pixel, GrapheneOS, and to a lesser extend Samsung flagships.