I just had Discover updating 33 items. While I can see what they are, as soon as I press "update", all I get is a simple (and stupid) progress bar. No information on which part it is currently updating, if it is downloading or unpacking, and, most important, no indication of how long this might take. I am well aware that the last part is the hardest, but even a calculation of "X of Y packets have been downloaded with A_X of A_Y bytes of download, so a rough guesstimate of remaining time is:" should be possible. If you don't want to confuse normal users with too much information (which I don't expect on a Linux system, but well), add a "show/hide details" button, if you wish. When I have to drive on autopilot, at least let me see where I am heading!
This is fixed in newer releases. Also please don't call names our progress bars, they get sad. :(
Could you please add in which Version this has been fixed? KUbuntu is still using discover 5.6.2 at the moment. And I've got an additional request - would it be possible to show change notes for the packages that will be/are being updated? A perfect hit would it be if discover would look at the currently installed version and the to-be-installed version of a program, and show all change notes, even if this update skipped one or more versions. These change notes would be nice to have a) before starting the upgrade and b) as a pastime while the upgrade is running. A "go back further" button on a programs' change history would be nice, too.
Anything older than Plasma 5.8 is no longer maintained. Please ask in a forum of your distribution how to update to a newer Plasma version.