Fast systems, slow humans

Every team I have worked with can ship faster than it can understand what it shipped. Marit opens Signal with a talk about the gap between the speed of our systems and the speed at which people build a mental model of them.

Drawing on fifteen years of on-call rotations, she argues for a small set of habits that keep a system legible: fewer moving parts, narrower interfaces and a culture where saying "I do not understand this yet" is a normal sentence.