I'm on a medium pop server so this is taking a little longer but a bunch of the larger guilds did precisely this. Hell, there's a discord for it and spreadsheets that track what's needed and how much we've all gathered.
No one sane expected Classic to be precisely like the vanilla experience. That was impossible since we know what is coming and we didn't then. But the game itself is remarkably close to vanilla, given the limitation (1.12 being the game patch, etc). If someone doesn't like classic, great. Don't play it.
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Of course Silithus is farmed to hell and back right now. But... seriously? You're complaining that there are people playing a game vs it being dead?
"No one goes there anymore, it's too crowded."