According to naraoia at The Mule Abides,
"the OSR’s love affair with the megadungeon seems to be over." Stephan Poag of Aldeboran adds:
"After a brief period of recently being 'in vogue' among the cognicenti of the OSR community, it seems as though the 'megadungeon' may be once again falling out of favor."
So megadungeons aren't fun now? Hmph. Where is this discussion happening?
UPDATE: Joseph Browning of Sorcergy & Super Science also posted on the megadungeon kerfuffle, which looks less like some popular turn of sentiment against megadungeons, and more like Joe The Lawyer not finding the first level of Dimmermound cinematic enough for his tastes. Ahem.