How do you figure out the types at run time with zero overhead? I guess we have different concept of "zero".

As for the price of my skills - my paycheck told me that. And sure, it could be low demand (there are vacancies in my field, that had been open for years, but I don't really know what kind of demand there is for Python, could be decades for all I care). I am just happy for my compensation and if others have more expensive skills - I am happy for them too :)