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.
By the way, I am not sure if it is a standard function of lineage OS, a standard function of Android 13 and above, or something with lineage OS on my specific OnePlus device. But I am able to limit my charge to 80% and it will never charge above that unless I turn it off. I bought the phone brand new and have been using that function since day one and it works extremely well.