Graham McNicoll
text published 2026-08-05 · Open on LinkedIn ↗
The average engineer stays at a company about two years. I don't blame anyone for that. Moving is often the fastest way to raise your salary, and I would do the same. But if you are running the company, that number should worry you. Everything your team has learned about your users, which tests won, which ideas quietly failed and why, lives in the heads of people who will mostly be gone inside two years. If that learning is not written down somewhere real, it leaves when they do. There is an old thought experiment called the Ship of Theseus. Replace a boat one plank at a time, and by the end you have to ask whether it is still the same boat. A company with steady turnover and no captured learning is that boat. Same name, same product, none of the memory. This is the quiet reason we built 5.0 the way we did. Your experiment history lives in GrowthBook, in your own warehouse. Every test, what won, what failed and why, sits with the hypothesis and the results that produced it. When someone leaves, the learning stays. This is important because wins fade, but learning compounds. Most companies chase the wins and let the learning walk out the door. The memory of what your users actually do is the one asset that should never quit. https://lnkd.in/gmZq8nym