Under no circumstances can a developer of wine, proton or React os look at leaked code. That would be a major liability.

Why? As long as there’s no copied code there’s no copyright infringement. Nobody can ever prove you had a look at some leaked source code.

What you’re saying is mostly the reason why we still have compatibility issues in Wine.

Anyways, do you really think that Microsoft is so worried about ethics and hypothetical copyright infringements as you seem to be? if they were they wouldn’t be what they are today… maybe that’s Linux desktop isn’t still a viable option? :)