Some people like working round the clock as hard as they can. Some people like playing with their kids in the evening. If you're a single 19 year old who can c

Some people like working round the clock as hard as they can. Some people like playing with their kids in the evening. If you're a single 19 year old who can code pretty well, seeing what you accomplish at twitter might be appealing. For other people it might sound quite unpleasant. Just different choices for different folks. This style is pretty consistent across SpaceX, Tesla, and now Twitter.