You go Queen! I think most systems these days will support Linux so no issues there. For myself I always like to have a dedicated Linux machine, usually have to do it myself as OEMs tend to do either Mint or Ubuntu. Mint is okay, but Ubuntu is too bloated for my taste. Of course I will always have Windows, I do like it and it supports the software I need. I will keep up with Apple as long as it doesn't cost me to do so, and well I have to do Android to have a phone. I like Android, but I don't trust Google. This is why I don't have a Chromebook despite having everything else.I get it, equally I don't need it. I was never a supporter of the argument of two settings apps (Control Panel & W10 Setting) being an issue by the Mac crowd as it was oblivious that MS needed time to migrate numerous legacy controls to W10 settings.
Adding GPE into the mix is just needless IMO, after all Home & Pro should be differentiated or what exactly are we paying for? As someone who is technically competent I may as well look to Linux if I have to jump through too many hoops with MS Windows. Vast majority of W10 consumer purchases come with W10 Home, not W10 Pro and they have zero inclination to upgrade. It's not a big deal, equally it irritates and adds yet another nail in the coffin.
Next hardware cycle I'll be certainly looking to systems that can run Linux with full functionality as macrOS & W10 is simply getting old. I revisit KDE from time to time, need to really sit down and work on the apps to get done what needs to be done. That said if the HW/SW list completes W10 will be done as no need for MS or Apple for that matter...
W10 1909 stands, relinquishing choice is never a solution to a problem, only a form of control.
Q-6
By the way, as I understand it, even with 1909, there will come a point that it too will set for upgrading. It might take a year, so you have plenty of time to get that Linux machine in gear.