I still remember the Steve Jobs era when people would praise Apple for having a simple lineup of devices, in contrast to Android, which had some crazy amount of variants of every device. How times have changed.
It's mainly just the iPad lineup that's a mess, but it's optimized for there always being an iPad available for increasing budgets in $100 jumps, give or take. It's confusing to try and keep track of them all, but that's not really the point. What they have is anyone can walk into a store and say "give me an iPad, I'll pay $600" and they'll get a good device.