At least it wasnt RMP, it was druid/warrior 90% of the time but hey, congrats.
Now to the numbering.
1)Comes passively by playing, i guess for Classic you have to force yourself a few more times cause knowledge so you did things faster, but this is just basic playing, and 99% irrelevant apart from Argent Dawn.
2)Irrelevant, be ahead of the curve, in Classic, sell Arcane Crystals, as far as i know, it will works in 2020.
3)Irrelevant, even back then it wasnt anything special, it doesnt give anything extra.
4)Same as 2, be ahead of the curve.
5)Can be relevant and thats a silly question, my character has to be maximized, of course if i wasted my time in Classic i would be wearing the correct shit.
Again, as i said 3-4 times before, your fun is your fun, it doesnt mean its something required for the game, the game itself from Classic to Wotlk, becomes irrelevant quite quickly, hence all the new designs.
This is about raid logging, wasnt it, despite the drifting cause of butthurt opinions.
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Nah, your fun is your fun, doesnt mean its relevant to the game progression itself is the point, people dont seem to get that