Make sure they /actually work/ on your computer; not for nothing Debian started to include proprietary drivers by default.
If you switch to <fully-free-os> and nothing works, then what?
We would all prefer no proprietary code whatsoever, but prefer even more that stuff would work.
If you really want to go for fully libre route, I'd consider buying –in the future or now, depends on how much do you want it right now– the correct hardware for it.
If the Windows key – that in most keyboards today also has the Windows logo – is called in KDE 'Super', a Windows command that refers to Windows in it, should have its name changed too.
I don't like green Chrome so I'll switch to rainbow Chrome and add an extension.