"You should create a group when demand is there and not the other way around." In other words, start from generalist communities, and create more specialized ones when there is a need. Do you agree?
Back with newsgroups the general rule was to go from general to specific. You start with a general discussion group and when discussions about video games get annoying you create a games group. If then there are too many Baldur’s Gate discussions you create BG. If they are dominated by Baldur’s Gate 3 you create a Baldur’s Gate 3 group. If everyone is fawning over Withers you create a Withers group which of course will be flooded with discussion about the Withers’ tits mod, which shall get its own group.
Meaning you should create a group when demand is there and not the other way around.
There's also the other case where you start a comm on a smaller instance, and then later on someone starts the same comm on l.w. and gets by default more activity >_<
At this point just moving off .ml might be a reason in itself as there appears to be a large contingent of people who outright refuse to touch anything hosted there. Or maybe those are just a vocal minority, I don't know.
Yeah I've definitely thought of that issue too lol (I didn't create that community), moving people is hard but maybe that doesn't matter cause the community is kinda dead anyways