There will be a lot of embedded systems with XP front-ends that just can't be upgraded
XP ?? How modern.
I know a precision engineering firm whose NC machine tool is controlled by a Windows 95 system. Because I got spares into stock (via eBay :-) ) for it about 8 years ago, and did some repairs 2 or 3 years ago. Mind you, if the multi-port serial interface dies, they will be SOL....