>One take-away for us from that viewpoint was that knowledge in fact is more important than the lines of code in the repo. We'd rather lose the source code than the knowledge of our workers, so to speak.

Isn't this the opposite of how large tech companies operate? They can churn develops in/out very quickly, hire-to-fire, etc... but the code base lives on. There is little incentive to keep institutional knowledge. The incentives are PRs pushed and value landed.