Watched this the other night, I don't fully agree with some things, mainly I don't remember struggling with the "campers"... I don't know if is because I've always been a stoic player and actually liking repetition (to get the most efficient killstreak to save ammo) or that we are now "spoiled" and judging with modern eyes.
Anyway definitely a game changer.
I remember trying MaxEd but I was already accustomed at the time with the generic "units" concept of Worldcraft editor and couldn't get my head around the metric system (despite using the metric system in real life). Also I think the editor was already working mainly/only in the 3D view(?). I'm sad I never tried any mod, despite being a huge fan of the game (although I always preferred MP2 that I found more polished and played like once every year after it came out for several years), but good mods came out when the world had totally moved on. It's indisputable though that the kung fu stuff is still impressive and not just because is on old stuff.