Even when you know what the computer is doing, without a progress bar your still likely to think it’s broken, stopped or just misbehaving. I wrote my own SFTP (ssh file transfer) application and every time I transferred a large folder or file and it took longer than 10 seconds I would be agitated, constantly checking that something was happening and sometimes just restart the application all together. I added a progress bar using the size on disk at the destination and total size to transfer and it helped massively