I just wanted to add this in as a feature request.
Obviously with a busy support team, a queue can change every single time you view it.
One of the most disappointing outcomes is when you finally revisit a ticket and notice that the user has replied on the ticket hours before, however, there was no clear notification that they had done so.
If there were some type of Replied tag that would be visually noticeable on tickets that users have replied to (as the latest reply), this could be a major plus to stay on top of response times and resolution times as well as customer care in general.

