Personally, me and my boys all just grew up and stopped living within a few blocks of each other. So we lack the time to just sit and do 20 rounds of something, and discord/private lobbies just don't feel the same as in person.

I imagine its like that for a lot of us who grew up doing it, and the new generation never got into it because the obscene cost (most games didn't support it, so you needed double tvs, consoles, and games to get the same experience) and relative ease of just random online lobbies.