A proof-of-concept doesn't provide any value. For Linux to gain further adoption a gargantuan effort is needed to get things from 90% done (or 90% working) to fully working. Any Linux distribution is already suitable for government use. Manjaro, Fedora, Ubuntu, Debian. They're all fine distros. The only remaining problem is quality. Things don't work or suddenly stop working for no apparent reason. For government use that's a deal-breaker. It's also a deal-breaker for gamers. Which is why SteamOS has been relentlessly fixing reliability issues. So if I had to bet on a linux distro going mainstream, it would be that one.
So it's questionable to me that you believe you're paying more.
You're just getting better hardware, but it doesn't mean it would be cheaper it it was specifically crafted for your needs. (= I buy 100HP and my engine supports only 100HPs).
It's ridiculous and insulting to buy a new car (a big purchase for many) to be presented with options where the manufacturer went through considerable effort to _make the car worse_. Manufacturers should be in fierce competition to offer the best cars at the lowest price point.
Chinese competitors will absolutely crush Volkswagen and Volkswagen will have nobody to blame but themselves.