The only meaningful lesson, I think, is if you're aiming to substantially grow and attract users and admins, you need to organise a team and users and contributors and backers need to have and expect norms around team work for buying in.
Otherwise, my "fedi-antenna" thinks the same energy wouldn't happen now, that a moment has passed.
But that's on the microblogging side. We're you're at with the thrediverse/forums and maybe better blog interop is new and exciting ground IMO!!