I used to use VirtuaWin[1] on Windows, which adds virtual desktops to it. It's possible it doesn't work in the most recent Windows (although, given Win compatibility, it could just as well work), but until Windows 7 (when I stopped using Windows) it was a life-saver. I used Enlightenment (E16) on some of my computers back then and after working with multiple desktops I just couldn't live without them. I mostly use 3x3 layout, with the main application I work with at the center, and other applications to the sides. Works great for me!

[1] https://en.wikipedia.org/wiki/VirtuaWin

Sadly the workspaces are very much mouse oriented (want to switch between workspaces? Thats win+ctrl+number!).

And there is no proper UI element for checking if you have anything open in a different workspace without opening the switcher.

You can switch with Ctrl+Win+Left/Right, too.

While true, it does not alleviate the finger yoga...

Not to different from most Linux DE's Ctrl+Alt+Left/Right.

At least any sane DE allows me to define them to be less gymnastic.