Some years ago I had a bit of a hot take that “reusability is a myth.” I said it out loud, in front of people. It got some laughs, and despite there being a lot more to the context in which it was said, I am often reminded of it. Occasionally I utter it, if nothing, for a fresh burst of laughter.
To be clear, that's not necessarily to say that reusability unattainable or idealistic, but a punchy way of asserting that forethought is hard, and hindsight still requires keen vision. Neither of which is expedient and both inhibit momentum. Regardless, as I falter at the helm of my editor I find it helpful to remind myself to focus on first making something usable, and let the patterns emerge naturally and worry about them later.