It enables you to actually switch between windows, not between applications. If you have 3 windows of Chrome open, on Mac if you alt-tab to it it raises all 3 windows to the top of the desktop window stack, hiding any other windows which may overlap with one of these Chrome windows. This is very inconvenient if you want to be able to still see another window, say, TextEdit, you have open but it becomes hidden by Chrome window 2 you don't care about that got raised to the cover the TextEdit window merely because you switched to Chrome window 1. Switching directly to one single window is very clunky on MacOS by default.
Command-tab already does this. Just keep holding command, use the up/down arrow to drill into the windows for the selected application. Play around with it you’ll figure it out.
It looks like this tool just simplifies it and gets rid of the hierarchy, so you don’t have to remember which application owns the window you’re looking for.
It might already do it if you hit up and down arrow, but my muscle memory and preference is windows-style. As someone who switches between the two often, I just want consistency and prefer the windows approach.
