And it does make me cautiously optimistic that as the kids grow up, some of us folks may find a little space for fandom again.

Hm, that's a point! If there's a whole cohort of us who went away (or semi-went away) to raise kids and are coming back around now and saying "What is this Tumbler weirdness, I want to interact fannishly via a long-form journal with well-organized threaded comments sections!" we can definitely just do it. :-D