But this stuff and more happened in OG wrath before RDF was introduced.
Clearly people do not remember the regular forum complaints about being denied entry to groups because of “Gearscore” and people having no bloody idea what it was because it was a third party site, and there was no indication in game for it (Not until later in Wrath at least)
WoW then decided to just make gear scores visible., but it didn’t really “Fix” the issue until RDF came out, but then Gearscore was just for raids only.
That is for raids. LFG will be complete full of messages “link achievement” and GG.
Make your own group… if no Gear score is required, you’re either playing with your friends only or you’ll get all the undergeared people that also don’t use gear score.
Gearscore was literally just an addon that assigned a score based on item level, slot and gear type (i.e. 2h weapons being worth more than 1handed), it was super fallible in that you could carry around a “high gearscore” set full of pieces you would never wear just to inflate it. Often times this included plate wearing DPS using Cloth gear.
And it’s a 12% drop rate on a boss many people will never do. Pretty rare.
And you’ll still use both together sometimes, gear is fluid.