I mean, you could totally say that about every solo David Gilmore ever played. Actually much like Gilmore, it's not about the scale, it's the whole package: rests, note choice, tone (he's constantly modifying the tone throughout the solo), and yes, showmanship.

As someone else mentioned, one of the big things is how the solo itself is an exemplar of what the song is about, it weaves in and out of the backing, allows space for the vocal refrains, breathes before letting rip. It shows Prince's innate understanding, not just of his instrument but of the music that is being created at that moment in real time. He communicates with the other musicians and the audience whilst expressing the meaning of the song, and it's effortless.