That's cool and all, but I either can wait for that to happen or not happen (which is not a certainty), or I can just use macOS (or a flavor of Linux).

Sure, the EU will fix things like they've managed to do in the past with other internet-related stuff (e.g., cookie notices). And I will definitely re-evaluate this take once things change in terms of ads for Windows. But until that happens, I don't see "the EU will fix that" as a valid point in favor of Windows.