I would agree. Most important two things to playing fast are light tough and relaxation. I have to constantly remind myself of those as every time I focus on an intricate run, my tensing up f's me up.
From my vantage point, doesn’t look like either of those amps are plugged into. But most likely he does have another Marshall backstage as he favors those old ones
I’ll never own, nor gig digital or modelers. I have tube combos and heads, as well as various size cabs. So I have many options available. I take the appropriate size rig for the venue.