This jumps out for me:

    ... concerns about security vulnerabilities on aging hardware ...

That's the cost of shoddy engineering. A security fix is basically a recall in any other branch of industry. We've gotten so good at recalls that we can basically throw anything at the wall and fix it next month if foobar again. And now the party is, well, far from over, but at least cooling down a bit.

There is no reason for PC hardware from 10 or even 15 years ago to not be usable today, except shoddy engineering and software decision makers giving up. I own a thinkpad x220 so I can mean that.