A significant number of apps require the latest version of the OS. The utility really does drop off if you are a major OS version or two behind. Trash? Maybe not, but definitely worth much, much less. I agree that 2.5 years is far too soon to stop updating the iPad’s OS.

Remember how computer were last decade, and you need to buy a new one every year and a half? Well that's tablets and smartphones now.

No, it was never “every year and a half”! It was more like like every two years for hardcore gamers and at least 3 years for real people.