So, more on physics and philosophy:  this discussion thread involving Wayne Myrvold, Vishnya Maudlin, and Matthew Leifer is a model of civil discussion in which it looks like mutual understanding is increased, and that should be enlightening, or at least clarifying, to "listeners".  Matthew makes a point I made in my previous post:

Matthew Leifer [...] Wayne, I disagree with you that studying the foundations of quantum theory is philosophy. It is physics, it is just that most physicists do not realize that it is physics yet. Of course, there are some questions of a more philosophical nature, but I would argue that the most fertile areas are those which are not obviously purely philosophy.

Wayne Myrvold (June 12 at 6:42am)

Ah, but Matt, but part of the main point of the post was that we shouldn’t worry too much about where we draw the boundaries between disciplines. It’s natural philosophy in the sense of Newton, not counted as physics by many physicists, and may one day will be regarded as clearly part of physics by the physics community—- does it really matter what we call it? [...]

Matthew's response: "Well, it matters a lot on a personal level if you are trying to get a job doing foundations of quantum theory in a physics department 🙂 More seriously, I think there is a distinction to be made between studying the foundations of a theory in order to better comprehend the theory as it presently exists and studying them in order to arrive at the next theory."

Matthew puts a smiley face on the first sentence, and continues "More seriously..." But I think this is more serious than he is letting on here. In my view, thinking about M-theory and string theory and thinking about the foundations of quantum theory are roughly evenly matched as far as their likelihood (by which I mean probability) of giving rise to genuine progress in our understanding of the world (I'd give quantum foundations the advantage by about a factor of 10.) In fact, thinking about quantum foundations led David Deutsch to come up with what is pretty much our present concept of universal quantum computation. Yet you basically can't do it in a US physics department without spending much of your time on something else in order to get tenure. This is part of why I'm not just annoyed, but more like outraged, when I read pronouncements like Hawking's about philosophy being dead.

As with Wayne's post on which this thread comments, I thank Matthew Leifer for the link to this thread. Do read the whole thing if you find this topic area at all interesting as there are several other excellent and clearly expressed insights in it.