I loved take home exams because they allowed me to study before hand but not have the insane pressure and condensed studying required for exams in the classroom. Even though they were normally much harder and longer, I liked them. I felt I learned much more through them because I could take the time to understand concepts I had missed without feeling the time pressure of in-person exams.
It's a shame that humans find a way to cheat ourselves out of things that benefit us by over "optimizing" the wrong things.
Exams in classroom with all the time pressure is also an important part of education. May be they should be low percentage of grade to prevent too much stress but it's am important learning experience