Betote
First Post
The appeal is simple: Some people like the older versions of D&D better.
Equating it with nostalgia is like saying the reason some people still listen to the Beatles or play Monopoly is nostalgia.
As for when it started... The first, a proto-clone if you will, was Hackmaster in 2000.
QFT. I know I can only speak for myself, but I've fallen in love with Labyrinth Lord without having played BD&D before. When I began playing RPGs, in my country the only D&D widely available was AD&D2. I played a lot of it, but I loathed it, rooting for RQ (3rd ed, I think; the one from Avalon Hill) and even Rolemaster. I wasn't what one could call a D&D fan until 3.5 (in fact, until Paizo's Age of Worms AP). I discovered LL some time ago and I've been using it a lot for one-shots made up in the spot or in class since then.
I also enjoyed HackMaster without having played AD&D1, and I'm waiting for OSRIC2 to hit lulu.com to see what was it all like back then. But, to me, LL has a value in and for itself, not because it emulated the rules of some other game I've never played.