ReactOS

Unless the russian government starts dedicating teams of programmers to it to try and replace windows, you aren't going to see it actually used as an OS. What you will see is benefits as advancements they make are funneled into Wine.

They do, but they'll go to the next higher court before, delaying everything. Have fun paying out of the ass for (((lawyers))) for years. What good is getting your money back if you go bankrupt years before that happens?
The (((legal system))) is rigged in favor of big (((corporations))) which can just bleed their opponents dry before a verdict is reached.

By that logic GNU, Linux and the BSD forks should have been shut down by UNIX proprietors, and things like Wine or Mono shut down by Microsoft by now.

I never cared for Windows. FreeDOS is ok.

No

I wonder if there's a way to take ReactOS's interface and install it on top of current Winblows.

If they'd come out of alpha 15 years ago, they could have been game-changing. As it is, they're increasingly irrelevant. There is perhaps some potential utility in ReactOS as a free minimal OS for running Windows-only software in VMs, but these days I struggle to think of any Windows-only software that would make me bother.

They went the way of the HURD.

You literally can

It's got a long way to go until it's useful. I'm doubtful it will reach that point before fizzling out.

It's still a risk that some companies can't afford to take, and even if it was an open and shut case, they would only be paid at the end. Only one side has the ability to pay an all-star legal team for years on end.

There's a lot of enterprise software that is wangblows only.