This sounds like something which, were it done by Microsoft, would be taken as evidence of terminal senility on the part of the technical leads. What is NetBSD's reasoning for doing it?
The difference being that in this case, it's a doohickey in NetBSD that you can turn on if you're feeling bored or deranged. Microsoft would make it the new paradigm for development and then deprecate it four years later when the next new paradigm came out.