The Impact of a Slowdown on Speed of Development

I come down on the side that there should be no hidden non-public APIs. I don't want something to be hidden and have an end user or a hacker out there discover it. So do you have a sense that there's a frictional force against the speed of development? Since now, everything needs to be carefully documented,. We're moving forward maybe more carefully, and less directly, less slicing through the problem.