It would certainly make sense to sick it on all those crash reports and complaints. All the obscure 0x error codes that end up with you being punted to the forums for 'community support' and being told to reinstall everything.
Those errors in 99.9% of the time are hardware related or driver related. I've personally not seen bsod or had a windows crash in years.
Last week my on board Lan card started erroring out but windows didn't crash, I just lost internet. Switched to wifi and moved on.
Your example is an excellent example of the sort of problem the AI could diagnose for regular users. Regular user might see their web browser acting flaky, blame their ISP, switch their ISP and find it doesn't help, try a different web browser once they learn they exist, get different problems... But it would hopefully be obvious to a diagnostics system if it got fed the system logs and details. Or maybe it would spit out some rubbish related to Windows 10 sourced from a forum post in 2018.