This. When you also bring in employees whose function is to do only one specific thing, such as editing a CI system, maintaining a google-specific internal tool

This. When you also bring in employees whose function is to do only one specific thing, such as editing a CI system, maintaining a google-specific internal tool for decades, they cannot easily adapt or are completely inflexible or incapable of changing. Anything that requires a tiny bit of creativity of a new change requirement, it is going to be an issue.