Jake, while reading another feature request (reopening closed tickets) I saw that you are considering making closed tickets' tags editable or something. You asked for cases where this would be helpful. Here's mine. Maybe you can migrate that discussion over here and change the status of this request.

Our customers have the ability to change the name of their servers, which we manage. They can create tickets from the server, which places the server name into the ticket. We use the server name to look up support history for their servers via links from management forms on the server. When they change the name of the server, it causes us to lose easy access to their old tickets.

Today, I was searching for a way to go add the new name(s) to old tickets. Tags would be fine if we could add them.

Thanks for considering it.