Inside an organization, separate repos and versions can simply be unnecessary overhead. As long as you can have an edict from above that 'thou shall not break t

Inside an organization, separate repos and versions can simply be unnecessary overhead. As long as you can have an edict from above that 'thou shall not break the build or its tests for you or your dependants; the punishment is immediate rollback', empower some people to enforce this, and have plenty of automated tests, distinct repos and versions are silly, unnecessary and massively inessential overhead. But if you don't have that balkanization is a reasonable option.