Can you clarify what you mean here? (not trying to be cheeky, but I'm just not grasping) What is the difference between a difficult task and a task that sees high growth in accumulation of knowledge? In terms of the classical orchestral musician/swe analogy I don't see what you are driving at.

>In high growth areas its not easy to make it big without working insane hours.

In classical music (and jazz etc.), you can't succeed at even a prosaic task such as winning an orchestra audition without working life-destroying hours. From age 10(or earlier, really) to age 40+, most classical musicians who "succeed" practice alone at least 4hrs a day, and rehearse, perform (and teach, when they are older) another another 4-6 hrs per day. There really isn't room for anything but this in their lives. That is the info I can offer to help w understanding this half of what you are saying. I think I didn't realize that this was not widely known. Coming from this life, it is easy to lose perspective on what is generally understood.

The difference is between usable and reusable knowledge.

If every few years you have to throw away a good part of what your learned and redo it, taking big breaks becomes very hard.

You can do this in music because you start exactly where you stopped. In programming we haven't yet reached a state where knowledge of tools, frameworks and ecosystem can remain the same for years. Things change pretty rapidly here.

It may surprise you to know that musicians can't take even a few months' long break without suffering professionally. Remaining in shape for an audition only lasts until the last few days before that particular audition. If you stop practicing for a few months, it takes at least that long to get back into shape. It is a lot like a professional sport that way. Illnesses are career killers, for example. Also, we have new repertoire coming in all the time by new composers-- whole new concertos to learn, new techniques to be hip to, new gear to learn... I can understand that it might look somehow different from the outside, but this is why a musician can't keep doing auditons forever. First, it is expensive and we don't get corporate sponsors like athletes do. It depends on perfect health, and many can't afford to maintain that without a benefactor. It also takes up every minute of your life to stay audition ready for job auditions and jobs themselves--no one can sustain that kind of mental,physical, and psychological stress for too long. But, while we can, men and women seem to handle these pressures equally well.

There's a level of navel gazing in large swathes of the startup community that assumes that no one else works as hard or needs as much knowledge.