Since you were there: What effect does that churn have on their technology? If the average developer only sticks around for one or two years before burning out

Since you were there: What effect does that churn have on their technology? If the average developer only sticks around for one or two years before burning out, subject-matter experts are going to be really scarce, and once you don't have any of those you lose the ability to innovate in any meaningful sense.