Android is Linux, even if it doesn't follow the philosophy of your favourite Linux distributions. Maybe RMS had a point when suggesting people call it GNU/Linux. Maybe Android/Linux?

It's also a symptom of a wasteful greed driven system. By abandoning old hardware the industry at large can quietly force people into 'regular' upgrade cycles. That's two years for their ideal consumers who trade in their old phones and get the latest. At most it's like 6-8 years before the hardware is simply too old to possibly keep running. Many frugal people run a cycle or two behind, eg they're on iPhones (or model year equivalents) 8-11 currently depending on their cycle timeline. There's no way out of the cycle. I had a few coworkers get dropped by their cell providers over the last few years as the carriers dropped support for cell phones they bought in the 20xxs.

Essentially this planned obsolescence is manufactured consent in the population wide crowd funding of cellular technologies by for profit (mainly public) companies providing essential communication services.

I'll leave the moralizing of this to philosophers, but all these dynamics and their externalities undeniably bear further scrutiny.