Kinda sounds like a ride at Schlitterbahn, don't it? Mebbe I'll suggests it ta them. Anywho, to me point.
This happened a while ago, but I didn't talk about it then 'cause I didn't exist yet.
Molten Core. Molten Core went live on Day One, November 23, 2004. Back then, there weren't no Lothos Riftwalker. No attunement. Only way in were through the portal near the back of Blackrock Depths. So, ya hads fer ta fly ta .... where the hell them first raiders fly to, before Thorium Point were opened in 1.5? Anywho, ya flew there (no summoning stones, remember). Then, ya'd mount up (most likelies on a 60% mount), ride ta the mountain, dismount, walk down the chain, shlog yer way through the Dark Iron Dwarves outside the instance (what woulda been elite in them days, and onlies about ten levels lower than you), then shlog yer way through more dwarves inside the instance ta the bridge, jump inta the lava, swim ta the first island, heal, swim ta the next island, heal, until ya finally reached MC. Back in them days, the lava hurt. Ain't like now.
What about Ritual of Summoning? I wanna say what that didn't work in instances originallies, but that could be me memory playin' tricks on me. I ain't sure, and me research were inconclusive. Even if'n it did, ya still woulda had fer ta wait fer the 'lock and some buddies ta do the dwarvenshloggin', and then summon everyone, and then "oops not enough shards". And great googly moogly whatta crapton of a tax on warlocks. If it worked. Which I ain't sure it did.
So how long did all this take? I figger about half an hour, give er take, once ya got ta the mountain. Half an hour every raid night, killin' lower-level dwarves an' swimmin' in lava, not gettin' loot or DKP or honin' yer skills or doin' anythin' constructive or interestin' or fun. All because Blizz thought it was cool fer ta put an instance inside an instance. In March 2005 they realized it were a stupid an' put Lothos out there so's ya only had fer ta dwarvenschlog the once. BWL has a portal inside UBRS, but there were also the Orb of Command attunement available the day that went live (patch 1.6). Apparentlies Naxx were also gonna have a portal inside Strat, but that done got 86'd.
How many buggers did the full-on dwarvenshlog? Prolly not many, since it were only a few months and just levelin' ta 60 took a while. When ya looks at the amount of time it saved, Patch 1.3 were one of the biggest, earliest nerfs in the history of Azeroth raiding, yet I suspects when some bugger says "raidin' ain't the way it were intended fer ta be no mores" that they ain't meanin' this time-wastin' silliness. Nostalgia, she's a pretty piece of wimmenzflesh with legs what go all the way up, but she'll lie her arse off in yer ear if'n ya lets her.