One thing I've seen is a lot of bitching about anime. In my country cons have been revived by anime which has brought a huge influx of younger female fans to cons which just keep getting bigger every year. Huge amount of fun. But I've heard a lot of old guard comic book guy types (who might not be old, but they have that elitist mentality) actually dipping into bitterness about it. Some see it as an invasion of shallowness but really it's just a territorial pissing contest that only they are taking part in as meanwhile a party rages around them.