If I have to cross reference info from two windows I like to have one floating and always on top. In that case its nice being able to roll-up the window to see whats behind it. Minimizing would be similar but it feels more permanent than rolling up.

RE: use case

It's really nice to be able to see the whole titles. A vertical panel cuts off most text, so you just have a bunch of icons when you minimize. if multiple windows are from the same app it's confusing.

If you use a horizontal panel you have a bit more room, but a significant amount of text is still cut off, and the panel fills up quickly.

Even with as few as 6 windows open (lets say two browser and three file manager, and a terminal) minimizing is a mess. I find it better to just leave the window bar somewhere visible and shade it, since i can read all the text on my window at a glance. Combined with "keep above others", you can get a really nice way to quickly refrence something infrequently while you do most of your work in another window.

A more typical workflow for me is 1-4 windows of a pdf reader, 1-3 file manager windows, 1 browser window, and 1 terminal window. It's just easier to keep it all organized with window shading.

I find it much faster than a bunch of alt-tabbing, or playing hide and seek with the panel just to get a specific two PDF windows up side by side for a second