In my department, users in every role (authors, editors, graphic artists, localization coordinators, and information architects) rely on inboxes to manage and transition their files. We do not currently use query folders. Inboxes are critical to our current workflows.

Query folders potentially could be quite useful, particularly for grouping common topics on a feature. But that is not enabled in our current (somewhat superannuated) distribution. Awaiting the update...

We had plans for inboxes with LiveContent, but the lack of email notification or other notification features made them insufficient for our planned use case. A certain hostility to the web interface on the part of some of our planners has also limited our use of them.

As a technical author, I use the inboxes combined with filters to get a quick overview of objects that are in a certain status.

I rely on inboxes combined with filters on SDL Trisoft. Filtering by user, division, and language help me find the objects that I need to follow up on a particular project. My colleagues and I hope this functionality will not be discarded in SDL Tridion Docs. Inboxes combined with filters have made quick search, easy access, and best possible overview possible.