IMO, this is a typical Apple troll article.
" mocks poor people" is the dumbest possible analysis of this data. I work for an organization with something like $1.5B in IT spend. Our 40th percentile PC is 8 years old. The 80th percentile PC is 4. Our desired refresh for a desktop PC is 40 months.
Why? The post 2008 recession killed discretionary spending. Then Microsoft failed utterly to deliver a compelling desktop strategy from 2008 to the present day. They finally got their shit together with Windows 10, but their fantasy world where the universe is transitioning from Windows 7->8->10 makes that more friction-prone than it need be.
Consumers are in the same boat. People skipped upgrades because of the friction involved in the transition, which is why Microsoft is dragging you to upgrade kicking and screaming.
Personally, I use my elderly in-laws as a proxy for non-technical consumers. They are technophobes -- a retired fireman and nurse respectively... not rich, not poor. When I met my wife in 2000, they were still leasing a telephone from AT&T. They made the PC->Mac transition in 2009 and were actually able to use their computer without worrying about the typical PC woes (AV, updates, etc). That Mac is aging and it's was starting to turn into the time to go.
With the iPad Pro, my father in law ran out to the Apple Store by himself, got the stuff he needed and got everything going on his own. Long story short -- he loves it. It does everything that they need to do, and is a more convenient form factor than the laptop. He hasn't touched the computer other than syncing music from the Mac to the PC since.