Github topics are great!
But applying topics to multiple repositories is slow and cumbersome. Functionality to apply a topic to multiple repositories would be very helpful.
Thanks for this feedback! We're always working to improve GitHub and the GitHub Community Forum, and we consider every suggestion we receive. I've logged your feature request in our internal feature request list. Though I can't guarantee anything or share a timeline for this, I can tell you that it's been shared with the appropriate teams for consideration.