> When I played (original vanilla) WoW I remember getting 2-3 fps in 40 player raids.

I had to look at the ground and get the camera as close as possible to cross between the AH and the bank in IF. Otherwise I’d get about 0.1 fps and had to close the game, which meant waiting in line to get back. Those were the days.

> So with the right UI layout made from addons I could still be a pretty effective healer.

I got pretty good with the timings and could almost play without looking at the screen. But I was DD and it was vanilla so nobody cared if I sucked as long as I got far away with the bombs.

> I don't even remember what the dungeons looked like, just a giant grid of health bars, buttons and threat-meter graphs.

I was talking a couple of weeks ago with a mate who was MT at the time and told me he knew the feet and legs of all the bosses but never saw the animations or the faces before coming back with an alt a couple of years later. I was happy as a warlock, enjoying the scenery. With a refresh rate that gave me ample time to admire it before the next frame :D