Exactly. Upgrading is a cost; not just money but also time. I upgraded my 1st gen iPad's OS exactly once (5 -> 6 I think) and it was a completely horrendous experience, involving PC iTunes.
The main driver of PC upgrades, apart from improved games, is bloat and the slow deterioration of Windows installations. It's not as bad as it used to be but reinstalling the OS and cleaning the fans can often substantially improve an old PC.
I still have my original iPad, but it's used for a very limited set of things as the browser is crashy and many apps aren't available for its OS.
Users want neither forced upgrades, manufactured obsolescence, nor bogus SaaS rentalware like Adobe Creative Cloud.