That description is just pure nostalgia, I miss old message boards.
> Greentext
They're nostalgic to me too but I definitely don't miss them
They kind of were what the fediverse wants to be without the bonus featrues. There were thousands upon thousands of small decentralized communities with tightly knit communities. If a board simply sucked, you could go to another one. Of course they did not federate, you had to create different accounts for each of them and information was only passed on by users being in multiple ones. However, they had traction. Unlike with lemmy today, there were hundreds of active communities for every topic I ever wanted.
A webring is as close as you could get to federating. No SSO, but you could use different sign-ins just like going from lemmy to kbin or so.
Looking at you, Microsoft Windows support team. At least some random blog post from 10 years ago probably has the answer.
Unless the only comment is "Solved it, nevermind.", then you know you're screwed.
XKCD for everything.