[joe-user]

I watched the talk last week, so perhaps my memory's a bit off, but "move fast and break things" was not the takeaway that I got. I thought of it more of "problems are going to happen, being able to debug them is important, and there are better tools available for dealing with that than what's common".

Additionally, I don't recall if he said it in the talk, but it's been my experience that type-based bugs often surface early and are generally incredibly cheap compared to other classes of bugs (functional bugs, logic bugs, security bugs, etc.).