Ah ok just read the article and not the proposal. I’m surprised that they went that far but as I wrote I think that lifetime annotations are a good idea, hope the C++ people find a way to add them to the language that actually works well, which sounds like an incredibly difficult task.
As long as you have your windows license key you can change your mind later so really you can do whatever. I’d recommend giving 100% linux a try if that seems fun. Obviously you’re gonna want to back up any interesting files that you have on windows either way.