Like on Medium, where typing out some tags would lead to suggestions, then telling you how many each particular tag
You know? Peakd kinda does it. I didn't know too. It recommends previously used tags I guess. But yeah, we need a site-wide tag cloud. Steem "had" one based on my research. Hive should get one too.
Almost feels like reinventing the wheel.
Haha, true. Peakd's tagging system, as you say, only recommends previously used ones, especially if you've used them frequently enough. I didn't remember much from Steemit, though. It's one of those little improvements that should be added to Hive/Peakd in a later update. Not a huge feature, but neat to have :-)