Excellent news! I read the discussion that has since been linked elsewhere, and got the general impression that there wasn't going to be a change for backwards compatibility reasons. Glad to be proven wrong!
the default might not be changed in 1.x, but this shouldn't make it less typesafe: access to nilable types would be checked.
there are also the z3-integration related checks which might even apply to index bounds or eventually other invariants, so this kind of safety is important for Araq and Nim https://nim-lang.org/docs/drnim.html
