I worked at Microsoft for several years about a decade after they lost those famous lawsuits and I can tell you that the company culture around monopoly power and user rights was incredibly well defined. The company was absolutely paranoid about doing anything ever again that would create that set of lawsuits and from what I can tell, in the 8 years since I left MS, that culture is still alive and well. It's probably why MS is the only company I still feel comfortable doing with, among the "tech" companies.

The hard slap they got from the government was enough to apparently permanently change the company culture around treatment of users and other businesses.

I see a lot of the excesses we see coming out of Google, Twitter, FB, to be a consequence of there being, well, zero consequences for their behavior. They're like petulant children who never learned limits and think it's ok to do whatever they want, no matter who they hurt. That's exactly how you teach children -- give them limits. Ironically, the same rule applies to adults.

This. The power company can’t cancel you for a tweet for a reason.

Laws that provide meaningful mechanisms like this would also be a good signal to keep companies from being in such a powerful position. That is good for everyone.