Anyway, implicit in your controlling / enable comment [ by virtue of the fact that this is the only reason you've cited and have removed them ] is a sentiment that controlling is bad, at least in this context.

I’d argue that when you have lots of information to navigate, control can be helpful.

That said, most schemes I’ve seen for such control start off with lots of categories and sub-categories resulting from Careful Deliberation and the system quickly dies on the vine. It’s a lot of work to maintain, and offers modest incremental benefit over your flat tag regime.

Presumably you don’t mean to denigrate control in an absolute sense, but as the owner and the person who’d be burdened with the tedium of classification, you see the cost/benefit from one perspective, while Fans Like Me see a modest incremental benefit as 100% goodness.

Not sure what you mean about just tags enabling, tho. I inferred you mean that categories that they do in a way that categories don’t. They both enable people to find info, but you probably meant something else.

Categories seem more controlling. Tags enable.

[does this edit box seem too white to you?]

Can an item have multiple tags? categories? topics? Do you ever plan to nest them into hierarchies?