The experience i have with scrum is similar to what the procrustean bed suggests. Funny thing -to me - is that usain bolt did not use scrum to win, neither did federer. You can’t go to the moon with scrum. But I do see value in it as long as I drop 80% of what it proposes. Scrum is just a passion killer. We shoud use the ideas from the No Estimates and Accelerate books