Except all women's colleges arguably still serve a purpose. There is reasonable evidence that women learn better in an all woman environment.

You may ask how trans-"women" affect this. Well there isn't much data on the subject (and unlikely to be anytime soon given how reluctant people are to research politically incorrect topics). However, given how any m-to-f transsexuals appear to be masculine men with an autogynephilia fetish, my guess would be they are effectively men for this purpose.