As Facebook and its fellow tech giants ballooned in size though, they began to consider these cultures’ liabilities. It’s hard for an employee to feel ownership in a workplace with tens of thousands, or hundreds of thousands, of people. So the cultures became impersonal, and the notion that employees had ownership faded. Internal transparency was still helpful for collaboration, but it also fermented rebellions, and company leadership grew tired of it.
Just like a company doesn't have tens of thousands or hundreds of thousands of employees overnight, neither does the culture shift so massively so quickly.
Reminds me of this unsourced Bill Gates quote...