I think it would be really cool if forums (e.g. linux distro forums, video game forums ect) migrated to use their own lemmy instances. This would have advantages:
- Posts that gain traction would be visible to more people.
- People wouldn't need to create another new account just for one forum.
I guess it is sort of like same advantages as if they used a subreddit, but with the extra advantage of them ultimately having control.