Boeing

You get to work on, see, be involved in building and designing some of the most iconic products in the world. The company has operations in so many states and countries that, in theory, the sky is the limit as far as possible opportunities exist to be explored. You are really part of the military-industrial complex.

Once you settle into something, the practical opportunities available are substantially less than what is shown on paper. There is office and corporate politics to deal with. Your career might be hampered based on your age, school, sex, etc. (depending, again, on the location you are at), which might keep you from reaching your full potential. Careers might have better progression for those who like or will move around the company sites and organizations, which means an advantage to younger and less family-oriented employees.

Stop using your reputation to attract and then disappoint your employees.

The new employees love the first few years. Then there's the inevitable plan to push more experienced employees out, instead of leveraging the combination of enthusiasm and experience.

And then a good portion of the former-young employees start looking elsewhere. That is a lot of wasted company time and money to jog in place.