Here is a simple suggestion.
In this picture you can see an example of a "Synchronize Directories" process which will be very long, probably two or three hours:
[img]http://black.winny.free.fr/Micro/TotalCommander/2022-07-17-Synchronize_Directories_Thumbnail.jpg[/img]
In such case, the user doesn't stay in front of his screen, but generally he stays in the same room or not very far. Therefore here is my simple suggestion. Could the bottom bar change its color when the process is completed? Say for example, a pale green background color when both folders are totally identical (0 difference, 0 unique left, and 0 unique right) and a pale red background color in all other cases. That way the user can have from his place the eye attracted by the change of the color, telling him that the process is completed and telling him immediately that there is no problem or that there are problems to analyze.
Thanks !
Jacques
User since 2005
Spoiler
Note : curiously it seems that I can't use the bbcode tag img. Perhaps I don't yet have enough posts previously published.