I was thinking of raising the same issue but I noticed that the total count is visible in the right-hand pane. However, you are correct. If it is known for the RH pane then it should be added to the LH pane as well.
With the current architecture, recursively loading all subfolder and subsubfolders to compute the item count, would be far too slow, especially with folders containing several thousand items.
OK. But… Clicking on a folder in the left side list immediately (almost instantaneously in less than 1 second) shows all 15476 items formatted in the middle list, with the total count at the top of the middle pane “Showing 15746 items, 1 selected”… So…the folder hierarchy must already be loaded and traversed in memory???
OK, no problem. Next version. More important things to work on right now…