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So many resources could be saved...
(discuss.tchncs.de)
This is a most excellent place for technology news and articles.
Let's take that one step further, imagine if once software support ended for a device you could simply install an alternate open source (libre) operating system and keep on using the hardware you paid for. On the computer side you can still use desktops as old as 2 or even 3 decades with Linux. I would take it a step further and argue that you don't own your devices at all if you cannot install an alternate operating system.
At least for some android phones this is already possible with Lineage OS.
Yes, also Graphene OS for Pixel phones, Murena, and some others try to make a viable alternative OS.