As an update because some people asked: No, I don't think running multiple accounts works. In fact I *do* that, I have both this account and https://mastodon.social/@mermaidindustries . What I've found is using accounts as "categories" is confusing for me, confusing for readers and fights against every piece of UI (as after all it is a workaround for UI that is not there).
If I were designing this feature I'd probably go with metadata over anything related to hashtags, but "featured hashtags" do sound like a step toward what I'm looking for here! One thing that IS unfortunate is they literally don't appear in the "normal" profile column-- I have to go to the standalone profile page.
How well are featured hashtags supported elsewhere in the fediverse (IE outside mastodon.social itself)? https://tabletop.social/@vylion/108133299520449161