The r/splatoon subreddit opened back to users around a day ago citing concerns for users not having alternative solutions. Not sure why squidboards aren't used (I don't really know much about it) or why someone couldn't set up like a Discourse forum or something.
Honestly, I think the goals of fedis shouldn't be to replace reddit, but to provide an alternative that people can check out if they wish to see/participate in a different community.
One of my biggest problems with reddit is that it centralized everything. You couldn't simply check out a different forum because most of community was on the sub. And if that sub happened to be a toxic hellhole, there wasn't much you could do to escape it without disengaging entirely.
My hope for the fediverse is that we are able to foster a culture of our own, so that people will come to us because they want to be a part of that culture, rather than just find another reddit.