Font tag export/backup
I'm not sure how long the font tagging feature has been available but I've only just discovered it and it's really great! I've just spent a couple of days really organising and tagging my font collections and it makes such an improvement to my workflow - I'd really hate to lose all the work I've put in.
So I don't know if this already exists but it would be very reassuring if there was a way to backup/export a user's font tags.