and
Very London-centric, middle-class, high income
Also it seemed more intelligent back then, I don't mean that in a snotty way, just that posters appeared well informed and well educated.
From the first two answers have a lot of truth in them.
I think the key think is that it has grown enormously, and there are so many people on here, and the issue with people constantly name changing means it does feel less of a community, and I presume it is much more difficult for MN to keep an eye on everything. Add in Trolls, bots, AI posts and there is a lot that is worse.
There do seem to be fewer real debates, with people making thoughtful contributions and people able to discuss in an adult manner, to me. Too often people lack the ability to discuss and things become polarised too quickly.
There is no SUCH a disproportional number of posters on the highest incomes and who want to talk about Private schools, considering both things belong to such a small part of the population.
I too, am addicted, and I agree there do seem to be far fewer funny threads.
But overall, it is such a great place to be, and there are still so many people who offer help and support - yes, even by disagreeing with the OP in AIBU, sometimes.