Sounds like nostalgia there, I remember around 2006 old reddit was a lot like 4chan, where link Russian roulette was seriously a thing, and I saw things I wish I never did on what seemed like a harmless thread. Reddit's always had a shady, icky layer to me. There's also the mass, thoughtless consumerism that doesn't help things along.
I suppose lack of retro gaming discussion is simply because of amount of users, as the site grows I 100% expect it to be made and created. I've noticed a lot of comrades like Oblivion for some reason (I personally love modding it like one of those train sets models people spend years on). On emus a rom community perhaps?
Just makes a good setup for total data loss where there's no documentation nor community to turn toward. As if whatever was made never existed. I'm concerned with all the forums that shuttered in the past years that moved 100% to discord and will soon probably have to reverse this trend.