Step 1: Create a culture in which "having open source contributions" is a requirement to entering said culture.
Step 2: Remove all friction from introducing open source contributions into the culture.
Step 3: Watch the Cambrian explosion.
Step 4: (Two years later) Point to the Cambrian collapse and how the new hot thing will solve everything.
I don't know what sort of shit show Step 4 will turn into, but it will also definitely be the result of folks taking a simple and good rule of thumb (this time, it won't be "small and composable"), and implementing it without ever stopping to think what problems it solves and doesn't solve.