Seems unnecessarily cruel and divorced from reality, even if that is the point. In real software jobs, you don't have to learn a new language, framework, and es

Seems unnecessarily cruel and divorced from reality, even if that is the point. In real software jobs, you don't have to learn a new language, framework, and especially a new paradigm in 50 minutes. Those are things that happen over weeks, months, and years. I don't know of any useful skill that adding even more stress to an interview will surface.