I think we y-inverters are a dying breed, brother.

I invert on controllers, but never have on the mouse.

I think it's from the days where flight-sims ruled

No doubt about it. I think Elite was the first first-person, 3D game that I played. It pretty much wired my brain to y-invert, with lots of reinforcement from Flight Simulator II and Starglider... carrying it over to Doom and Duke seemed most natural.

While we're on the topic, Google Maps has mousewheel zoom backwards, too, and now it has become convention. Jerks.

I've given up on advocating ESDF. :(

It's actually in the game, there just isn't any GUI for it yet, so the only way to trigger it is to press F4 :)