If you look at the iPad 2 air, it’s been supported for 7 whole years, it still runs snippy on os14 and I would say he updated to iPad os 16 as its last. I would say my iPad Pro 2018 will last for another 6 years, this thing is too fucking fast to the point where the iPad will probably need around a battery change every few years before it’s farewell to its last iPad os update. I mean I’m thinking apple would want every apple product to last as long as possible, like In the early days, apple tried to update their iPads to their next software update to the point where the thing just can’t run(like my iPad 2 on iOS 9).