Spit out a list of things you guys do "now", and I can tell you everything that was known or, as unlikely as it is, unknown. Whether it was done or not, is not the argument. The argument is that you're pretending like vanilla WOW wasn't completely dissected by the time TBC came around. There's a difference between knowing, and utilizing. Yeah, we knew warriors could use leather, my guild had a couple of them because we had an excess of warriors and like, 3 or 4 rogues. We knew about all the buffs, we just didn't utilize them often because you'd die, making them useless. I always carried around heal power oils and had ZG enchants, the whole shebang. If it was easy enough, or something I could get reliably during downtime, I did. Not everyone did because not every gives that much of a shit. Some were nearly impossible to get, like the Silithus buffs on an RP-PVE server. Stopped fucking with the fire resist buff out of UBRS when they reduced the player cap to 15, making that shit take way too long. Name a buff, I can tell you if we used it or not, and if not, why.
Also, it's not like all this information wasn't listed online, either. Wowhead became a thing in January 2006.
Comprehensive Classic WoW Consumables List
I can vouch for Ossoi in that he did raid vanilla -- I was in his guild. We downed Nefarian with a gnome fury/defense warrior. Ossoi was a druid. That was middle/late 2005. I left after that, so not sure how many gallons of gasoline he's huffed since then, or if he played at all in 2006 as most of the shit being talked about didn't exist until then, either. He's always been a bit of an asshole with a side of Down's.