The new design has alternating row colors in list views, so it's no longer needed. Or what else are you referring to?

It is not the alternating rows that is the issue. It is highlighting the row as you mouse over it. When the job list gets long and you want to click on the start icon it is hard to see which job you are going to actually run since the job name is on the far left hand side of the table and the icon to start the job is on the far right hand side. It happens to me all the time where I think I am starting a given job just to realize that I clicked on the job above or below the one I want. If you highlight the row that your mouse is hovering over then you can see exactly which job you will be starting when you click the run icon.

Alternating row colors solve the same problem, don't they?

Not to me. The alternate color is so close to the normal color that I can hardly see the difference between the two. If you view the list of Jenkins jobs on a wide monitor it really shows the issue.

To me adding this back just helps the user experience. I use jenkins every day and run into this issue. It is a usability issue.

Add the following to the style.css on your local build:

.bigtable tr:hover {
background-color: #f0f0f0 !important;
}

And tell me if it doesn't look better to you.

Right, the darker color is a bit light.

Would a more pronounced alternating row background color work as well for your needs?

Me personally I would like both. I think the hover effect really makes it easier to see which job I am about to start.