Prince, looking at his body of work (especially live performances) was a sui generis on the guitar ... but I'll throw this out:
Let's say that Van Halen was getting ready to kick off the tour to support the 1984 album ... but then something befell Eddie Van Halen and he suddenly was going to be unavailable to tour. However, the other three guys in Van Halen, with EVH's blessing, are determined to find a way to go forward with the tour. Hiring on a replacement guitarist is necessary.
Prince was one of the very small group of guitarists who could have credibly stepped in for EVH in a situation like this. It would have been different from EVH's tone, of course, but the requisite technique. hand speed and musicality were all there in Prince's playing. As a bonus, Prince could ALSO have played any of Eddie's keyboard parts. The Van Halen crowds would've gotten their money's worth and then some.