Updating a constant versus a config parameter isn’t all that different if the build is fast.

I do think modularity will remain important because it makes merge conflicts less likely, and a system with good modularity could look a lot like a plugin system, except that AI can likely deal with minor compatibility breaks if it’s clear what to do.

It’s a similar argument to why Linux device drivers are in-tree. If there are API changes then the AI fixes the callers. Compile-time checks are good because it’s direct feedback to the AI.