So they DO have source control. It's just 100% manual instead of (partially) automated. I wonder what happens when the "source master" receives everybody's tar

So they DO have source control. It's just 100% manual instead of (partially) automated. I wonder what happens when the "source master" receives everybody's tarballs at the end of the work week? Manually inspect them all and manually merge the source files? Or, pick one at random and tell the engineers to merge on their own next week?