I'm seeing the first glimmers of such nostalgia for BC content start to emerge, and hearing a Sunwell PuG advertised as a "fun run" the other day left me speechless for a moment. It's equal parts compelling and unnerving; part of me misses the struggle to down bosses in Tiers 4, 5, and 6, but I also remember ugly M'uru wipefests. Everyone likes looking back on the first boss kill, nobody likes remembering the 45-minute trash respawn timer in SSC, and I like to think that as the game has "grown up," it has also gone resolutely forward.
But then, I'm not an old-school WoW player on the level of these forum posters, and I'm also not sure that the nostalgia for BC content will ever approach that for classic content. Is, say, Black Temple going to be looked upon as fondly as its classic counterparts like AQ40 someday, or is the classic "classic" and irretrievable for a reason?