Those are once-off tests. I didn't have to take an SAT for every college I applied to 5 million years ago, but I took one, and all the schools used the test.

Those are once-off tests. I didn't have to take an SAT for every college I applied to 5 million years ago, but I took one, and all the schools used the test. If I'm looking at three places and each of them want me to sacrifice a day for the interview, that's a lot of my time, especially if I am currently employed.