That's a good point: things being multi-fandom makes it harder in some ways, because while fannish groups share a lot of commonalities, it's harder to meaningfully interact with other people's work when you don't have the fandom in common. In the days of single-fandom archives, you at least had a fairly built-in starting point to meet people with!

On the one hand, I think a lot of my longer-standing/stronger/better fandom friendships are with people who I don't share fandoms with (or only occasionally do in passing.) But on the other, while we have a lot of fannish interests in common, and can commiserate about writing or art or the like, we mostly aren't commenting on each others' works.

And lol, yes. I know the feeling: it's hard to find chill spaces for single fandoms that don't fall into ship wars or infighting over characterization or whatnot! Much less for a pan-fandom community... but still, the older smaller archive style is a lot more conducive to that sort of mutually-supportive attitude, or at least I think it could be!