I know we discussed this multiple times before (at least among the mods and admins) and it was said that this was hard to implement and maintain, but I don’t think this is true anymore. meta.discourse.org uses a tags dropdown menu and I didn’t find a single topic asking how to get it, so I’m guessing it’s a simple admin setting and I really think we should enable it.
Without it the only way to see e.g. a list of untagged topics in the #discuss category you have to enter the url manually: /tags/c/discuss/none/none.
Here is how it looks like on meta.discourse:
Does anyone see a reason not to implement this?