Edit: hashtags don't work, so I am am using "tag:blahblahblah" in a text box instead, so searches for "tag:" bring up all tags and searches for "tag:blah" will bring up anything tagged "blah". Tenth anniversary of this feature request. Not structured, but until they get around to it, this will maybe be ok instead. If they do,they should make it easy to convert "tag:" or any arbitrary text string to their tagging format.
Edit: hashtags don't work, so I am am using "tag:blahblahblah" in a text box instead, so searches for "tag:" bring up all tags and searches for "tag:blah" will bring up anything tagged "blah". Tenth anniversary of this feature request. Not structured, but until they get around to it, this will maybe be ok instead. If they do,they should make it easy to convert "tag:" or any arbitrary text string to their tagging format.