Mozilla addresses this, in part, by having one "module owner" but also multiple "module peers". All code changes in a module should be reviewed by the owner or

Mozilla addresses this, in part, by having one "module owner" but also multiple "module peers". All code changes in a module should be reviewed by the owner or (more usually) a peer. Having multiple peers reduces module owners' review burden, reduces bus factor, and gives "reviewees" someone they can appeal to if their PR is rejected. Linux has a similar organization with Linus' "lieutenants".