If it’s room sized and sold to other companies it will rapidly be in multiple countries.
There wouldn’t be any way to keep it to one company with it being public knowledge.
Like realistically I’d think any country would ignore whatever laws on the books and just outright sieze the tech as a matter of national security and duplicate it for their own use if they found out a company was hiding such a thing.
From there it’d again leak to all other major countries in short order.
If it’s small and easy to duplicate, (can it replicate itself?) It would spread like wildfire and would like piracy be completely uncontainable.
I don’t think there is anyway the tech could be either contained or kept secret any real length of time.
Mint (MATE). It’s preconfigured closest to what I want, with just a couple tweeks I can do whatever I need with utilities and a GUI I’m familiar with.
If Its a headless machine Ubuntu or Debian. Again familiar with both can do whatever on both without having to relearn low to build a wheel.
Primarily a windows user but I do use Linux for some applications.