I think it is interesting that the highly rejective privates actually restricting access to CS in some way are much more the exception. As another poster noted, others have just supported CS becoming a very popular major.
They could secretly be limiting CS intenders in admissions, of course. I just wonder if they really find that necessary in light of the other components of holistic review as practiced by these colleges.
Like, imagine a crudely simplified version of Harvard admissions where to get admitted, you needed to also be one of Newspaper Editor-in-Chief, Student Body President, or Varsity Captain.
Some CS intenders would survive that cut. But is it necessarily relatively more than Harvard admits today? I don’t know, I just think it is not obvious that Harvard has to do anything other than what it normally does anyway to get to the observed level of CS majors.