>>The Windows key has been present on keyboards for a while. I had it on my previous keyboard and now on the new one. The only difference with the new one is that the Fn key is inserted between Ctrl and the Windows key.
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>>Thus, when used to do Alt+Tab, this results in Windows key+Tab now. I believe over the years Microsoft and keyboard manufacturers opted for users to use that now to navigate between applications. If you try Windows key+Tag on Windows 7, you will get a caroussel of all applications moving in a 45 degree angle or something like that. While I prefer the standard Alt+Tab sequence to move between applications, as I hit this combination by mistake, as I am used to do Alt+Tab, I have to get used to it.
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>Just had to try it. Both combinations give you a rotating list (ubuntu 18.04).

All that effort to "retire" with windows free machines and you have not chiselled out that specific key ?