From the few videos I have seen they seem to focus on a sound, era, song or player. I guess Sadowsky havent hit that point with them yet. But you could say that about many builders, Mike Lull, Gus, Mayones, Marleux, Warwick are a few that spring to mind.
Its entertainment with a tiny sprinkle of knowledge is how i see it so i dont always pay that much attention to what they have been up to if I am honest.
Jonny