rascalpenguin

This is very true, and is the case with many 'laws'. Another example is with centre of masses: Take a hollow sphere, clearly the c.o.m. should be in the very middle, yet an object placed inside has not force whatsoever on it so it isn't attracted to the c.o.m. and the idea breaks down (NB objects outside are attracted predictably).

This is because this idea is purely a tool to make calculations of large groups of particles as easy as one, but it does break down occasionally.

Yeah that's right. Further, it's not that Musk just tells investors to go do one for humanity. They know if they let the business grow more now, they get even larger profits later.

I imagine this is because the majority of revenue is spent on growing the buisness, rather than going into profit (As profit = revenue - expenses). As Tesla still has a lot more space to grow. Same method Amazon did until recently for years.