So recently I’ve been seeing the trend where Android OEMs such as Google, Samsung, etc. have been extending their software release times up to like five, six, and seven years after device release. Clearly, phone hardware has gotten to the point where it can support software for that long, and computers have been in that stage for a very long time. From what I can tell, the only OEM that does this currently might be Fairphone.
Edit: The battery is the thing that goes the fastest so manufacturers could just offer new batteries and that would solve a lot of the problem.
Other than a flip phone in 2005 that died a death I now have the skills to fix, I have never bought a new phone after only one year. I upgraded from an S4 to an S10. The time to flat out reject the yearly release cycle is over a decade old at this point.