Android/Google tried to make this a bit easier through Project Treble, which is like a “core” of android that can be easily updated, then vendors build their modifications on top of it. It’s pretty widely adopted now, but that doesn’t stop companies from deciding they don’t want to support hardware from three years ago even though it is still compatible with the latest Android core.
What I’m hoping for is more investment into supercapacitors now. Charges very quickly, and most don’t have any kind of degradation. Biggest issue is that they don’t hold nearly as much power as current Lithium systems, but there have been research papers mentioning ways to get around this. There’s also a few other minor things, but they would solve the need to replace batteries over time.
Of course, one of the main reasons there may have been little research for supercaps is cause of planned obscelescence…
If you decide to go BMG, trianglelabs is among the best clones I’ve used:
https://a.aliexpress.com/_mNwY2NK
In the EU that isn’t as much of an issue when it comes to Android because they mandate that the bootloader must be unlockable (compared to the US at least, cough SAMSUNG cough). So as long as the device is somewhat popular, you’ll always have updates through custom firmware like LineageOS.
Doesn’t help Apple, though they’ve been… surprisingly good with last generation updates lately? iOS 16 can be installed on an 8 year old(ish) phone.