I remember back in the day when I had apple devices where they would push updates for devices long past their capability to actually run the updated software. Rather than refuse the update or get a pruned patch with security fixes only, it would force updates and bloat your phone and grind it into unresponsive unusability after a few years.
I hear that's not so much the case anymore, so that's nice. But I remember. The main reason I upgraded my phone was because of that, the hardware was great, but I could hardly use the software anymore even after clean installs.
My point being, I guess, extended support is great if managed properly but it can also become a bludgeon with which to drive you toward the new generations of devices.