Yep, and it was completely just fluke too, because within 5 years of that they'd butchered/tamed the whole concept of 20% and that kind of independent project wasn't a thing anybody at Google could do, even if 20% still nominally existed [re-routed to be "you can add 20% to some project at Google that already exists and is approved by corporate already, etc. and btw you'll still be doing your normal work for most of the time, too"]
When I was there from 2012-2022 it really wasn't a thing. Once Google found its money printing machine it swallowed everything.