It wasn't just the guitar. Dude could play anything. Horns, drums, keys. He had a 5 octave vocal range. Like the only one hitting notes higher than him was Mariah Carey. Dude could dance like James Brown. And the guy just could not stop writing hits. And then you get into the albums he's produced. I mean it just goes on.

He was just a complete package. One of those kinda special prodigies that comes along only every once in a while.

But when talking about his guitar playing most people point to his solo during the tribute to George Harrison tribute in 2004 where he is 46 years old. https://www.youtube.com/watch?v=dWRCooFKk3c skip to 3:28 if you wanna get to his solo.