Has Physics Gotten Something Really Important Really Wrong?
This is Smolin, making his usual, and valid, criticisms of modern physics. Smolin's basic complaint is that there is no experimental evidence for string theory.  The math is pretty, and a whole generation of physicists have worked on it, but nothing is experimentally testable. Everything is too small or at too high an energy level.  A practical implication is that it doesn't lead to any technology.Smolin also doesn't like many-worlds, because it talks about unreachable regions. This he considers too speculative.  There's a basic problem in quantum mechanics, which leads to Schroedinger's Cat, the Copenhagen Interpretation, and, in the end, many-worlds.[1]Physics has been stuck on this problem for almost a century now.  Philosophy won't help.[1] https://en.wikipedia.org/wiki/Copenhagen_interpretation