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.
I usually buy high end devices, that tend to last 4-6 years. I usually choose by camera, battery, and charging speed. I’m currently on a 4 year old Xiaomi that has an great camera, the battery still last over a day, charges 5000 mAh in slightly over an hour. I have never broken a screen or lost a phone in over 30 years. I buy the latest and greatest to make sure my investment lasts.
I tend to buy the last years iPhone when I get a new phone, it is cheaper and has less bugs.
I am still on the iPhone 12 mini