Sounds like Joe will direct his anger towards Slack and Spotify, and as a paying customer he has every right to be upset when his software doesn't work.
I doubt he will - they didn’t change, his OS did, they worked before, post hoc ergo propter hoc. Anyway, they’re from different companies, how could they both be at fault? If he even identifies them as related - he probably had them both running at startup and never quits them.
How much cognition are we assigning to Joe in this hypothetical scenario? You make him out to be barely more capable than a lab chimpanzee dully poking at a screen to get some fruit. Give Joe a little credit, people aren't as dumb as you think.
I think there's a propensity for cynical tech-oriented people to look at non-tech people as if they're dullards. I'm not convinced, I take a more optimistic view of people.
