i don't think the hardcore community dies out. those who play hardcore will always be hardcore. If you rage and sulk about how you died in hardcore or died to disconnected then perhaps you were never hardcore in the first place and should go back to soft core play. Of course in every game there are idiots, so its only natural that there are a few in hardcore.
the most difficult thing about hc is finding end game gear, because its always taken out of the economy when people die. gold just stays in peoples stashes and is transferred from player to player via AH.