The problem with this idea is you can't architect safety as an afterthought. You choose different patterns and different program design.

In my experience, almost all of these are actually better (e.g. better separation of concerns), and I wish I had thought of it that way immediately. But I didn't think of it that way immediately (though the more I use Rust, the more I do).

So if I wanted to move as fast as possible, going with my initial ideas, yeah, Rust would get in my way.