"Revolutionary Thinking? Colleges Let Students Opt Out of Admissions Exams" article focuses on UChi

Colleges & Universities University of Chicago
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UC has been talking about it for several years and has a couple of ongoing studies on the topic. Much is in the public domain. For example,

https://www.latimes.com/california/story/2019-10-02/uc-sat-test-optional

https://www.insidehighered.com/admissions/article/2019/11/25/top-university-california-officials-endorse-going-test-optional

While I have no inside info, my opinion as a long-time UC watcher is that they will get there in the next few years.