I’m curious what others have experience here, as a code base grows. I’ve been on several teams that consistently endeavor to keep the knowledge of a code base

I’m curious what others have experience here, as a code base grows. I’ve been on several teams that consistently endeavor to keep the knowledge of a code base shared, but every time the code base reaches a certain size, the Bus Factor creeps right back in, but this time for “modules” or areas of the broader code base. Combine a large code base, 4-8 engineers making constant changes all over, and it becomes a real struggle to keep everyone “up” on the whole thing. Has anyone seen a workable strategy for this?