You're never going to have a tablet that is future proof if you don't want to upgrade every year... because there will always be newer, better ones coming out,

You're never going to have a tablet that is future proof if you don't want to upgrade every year... because there will always be newer, better ones coming out, and newer versions of Android. Your complaint isn't that buying now would force you to use an outdated operating system, it's that you would use an outdated operating system for a little longer than you normally would.