I buy myself a Apple device every 1-2 years (alternating desktop, laptop, tablet) so that every device is in use by me for about 3-5 years and then gets handed down to the family (spouse, kids, parents). The demand is big enough that the alternative of selling the devices never occurred.
So the Apple devices are not disposed and in use for more than a decade while my devices are up to date. I think this happens in a lot of families. In mine it had been this way for about 30 years when I got a Performa 630 handed down from my dad.