To be honest, I simply didn't know.
What with all that's going on, I think many news stories that would ordinarily lead the headlines are getting buried under articles about Boris wearing a blue face mask, or how Trump is doing badly in the elections and so forth. We've had a good 6-months-ish to bury bad news so far.
But, yes, it's shocking to lose someone so young so unexpectedly. And he really did seem like a nice guy too.
(I was not a regular viewer of Mythbusters, but I've caught many an episode incidentally and, as you might imagine, I thoroughly approve of a show all about conducting scientific experiments to debunk myths. So he was doing good work too, as well as it just being entertaining and he was so pleasant with it.)

"Words ought to be a little wild - for they are assaults of thought on the unthinking."
- John Maynard Keynes