Hey, at least he doesn't wear velour jump suits any more:
What I'll miss if he leaves, are those videos where he makes commonly used industrial methods sound amazing. Like that one about making cases for the Apple Watch, which is the same method used for millions of other watch cases. Or the trashcan Mac case, which is the same extrusion method used to make millions of cooking pots.
And, of course, as an American, I'd miss the lovely British "aluminium" pronunciation