I thought it was going to come with column sorting, like the typical latest view. I am just now trying to work through a huge backlog of messages as admin, and it would be very handy to be able to sort by which messages have had replies or been viewed.
I think this is mostly a feature for moderator or admin users who have a larger number of messages to manage, so I understand if it’s not a high priority. I can see via this handy data explorer query that it is only me as user 1 and discobot who have thousands of messages in our inbox, sent out automagically to new users. Ordinary civilians tend to have only a handful if any.
Filtering in this view would be helpful too at some stage, to allow us to bulk archive welcome messages that have no reply, for example.