Mobile plans?

Because a task bar doesn't require you to execute an extra action, then try to find a tiny preview window out of a blurp of always-moving-around windows? Because it is always there so you know stuff is available instead of making you hunt for windows? I've had the option to slam my mouse to the top-left of my screen for 5 years and while it looks fancy and I tried using it, it never stuck. Simply because it is an inferior solution. Maybe it works for some people, but most certainly not for everyone. This has nothing to do with GNOME shell or any kind of hate - it's just a practical fact. If this would be a good solution, I'd be using it already for a long, long time.

Note that showing window previews on alt-TAB with a similar layout DOES work for me, but this isn't available in Shell :(

BTW the extension offering a taskbar is a crappy one - no drag and drop of tasks to virtual desktops, no switching between applications through scrolling... That extension is no replacement (and typical for the state of most extensions in my experience). It's why I removed GNOME Shell 3.6 again from my laptop - it's not there yet. Let's see if 3.8 will do any better - but I won't be trying it for a while.