Maybe more people aren't running older hardware because it's too difficult, rather than because they don't want to. The basic idea is here is taht if a device can still hold a charge and the user is OK with limited features, they should be able to keep using it as long as they feel like it.

Citing large absolute numbers for rhetorical effect is dishonest because multiplying a huge number with any percentage will result in a shockingly large number. The original claim is that "people who keep computers from 2009 to play with and wish they could get more use out of their 12 year old iPad Air [...] it's simply not a thing for most people", which is true even, if there are millions in absolute terms.