It's way harder than it looks. Maintaining mental stamina for 50+ minutes and not messing up isn't easy. Even just watching a 50 minute video will tire people out. Actually playing it is even harder. There've been at least 2 or 3 times where I got down to 10-20 minutes and then my mind just "relaxed" too much for a moment and I ate two hits of a charge, or circle lightning, and died. So appreciate it not only as a test of knowledge/experience, but of endurance.