If you compare ‘Meritor Savings Bank v. Vinson’ to these cases the trend is much less extreme situations having significant repercussions. Which eventually hits more CEO’s becase their simplicity are fewer CEO’s of major organizations and thus fewer CEO’s committing extreme over the top acts. Aka more cases of comments than inappropriate touching, more touching than grouping, and more grouping than rape.
However the impact of CEO’s vs the 1000’s of lower level managers is less in that they directly impact fewer people even if they have oversight over large organizations.
As to removal over time that’s extremely sensitive when dealing with CEO’s so the bar has been rather high. Still you can find cases 10+ years ago.