I’ve spent a LOT of time thinking about this, as I had some fretting hand RSI issues in college. I actually didn’t really pick up on the way ideal position could change with strap length and neck angle until pretty recently when someone pointed out that Slash actually had a pretty relaxed wrist angle in a “classical” position with his strap slung way down but a sharp neck angle, but focusing on the fairly middle-of-the-road strap height, I think Satriani does this really well:
That should start just before the main solo. Watch Satch’s thumb position as he gets into the solo - he keeps jumping effortlessly between the “classical” position, with the thumb behind the neck, and the “blues” position, with his thumb over and around the neck. With his fairly standard strap height and guitar angle, he’s mostly shifting positions based on how “stretchy” the run he’s playing is - the fast legato stuff where he’s covering a large amount of fretboard real estate tends to find him shifting into classical posture, but when he’s staying more in position or bending notes, his thumb materializes on the top of the neck, where he has a little less wrist angle break. I don’t think it’s a coincidence at all that he’s also a guy who has never really had RSI issues - he alluded to a little bit of trouble when he did The Power Cosmic arpeggios for a guitar magazine, but that was about it.