> Developers do need to pick a set of core technologies, and stick to it or a career can fall apart I bet. Over time any set of "core technologies" will be leg

> Developers do need to pick a set of core technologies, and stick to it or a career can fall apart I bet. Over time any set of "core technologies" will be legacy and your career will be over. In this business, you'll always need to absorb and learn new ideas, platforms, technologies, languages, etc. or eventually you'll have to do something else.