With all due respect to the original poster, if one is not seeing discussions about roleplaying on these boards, one is not looking, or only started looking a short while ago. As has been mentioned, there have been endless discussions about alignment, about character concepts, about getting into character, what level of immersion one likes, etc. etc. etc.
All that said, when I started playing, "roleplaying" was something almost never discussed - I started playing 1979, so the notion that the hobby went from being not far removed from a miniatures game, to immersive roleplaying perhaps reaching its apogee in LARP, to swinging back towards a war game, is amusing to me. It strikes me that focusing on the mechanics of the game is, indeed, returning to the old way.
1e and 2e didn't bring us roleplaying. To that I can attest, as I have years of first-hand knowledge of both games. Find for me any substantial sections in the 1e and 2e core books that focus on roleplaying; it isn't really there. We filled in the blanks on our own. Sure, the nigh-infinite line of 2e "complete handbooks" did give substantive attention to roleplaying but those books came long, long after the RPG industry was well established.
D&D has never been as focused on the roleplaying aspect of the hobby as some games are. As a matter of fact, many of the games that arose that focused on roleplaying came about as a reaction to D&D.
As an aside, if one wants to have a discussion about roleplaying (or anything, actually) on these boards, one can simply post a thread and say so. However, starting off by saying that nobody ever discusss these things, and implying that somehow everyone else is at fault for it, immediately puts people on the defensive. Better to just say: "anyone have any cool character concepts they'd like to discuss?" or some such. And I've seen plenty of threads like that; I've actually hung around these boards for a while.