[lazaroclapp]

I am not sure "it seems like no one else could have done it" applies to Nobel Prize type discoveries or Moon Landing like feats of engineering, much less to software companies.

Don't get me wrong, I don't mean to say that many employees at companies like Google are not brilliant or not extremely effective in their work, but "no one else could have done it" is a useless test that relies on mythologizing people. The way I figure out, the people getting rich (as employees) are those that: a) took the risk to get in early enough, b) performed their jobs competently enough to stay long term and to give the company a chance to succeed, c) got lucky enough in that all the imponderable external factors also resulted in that particular company succeeding. That doesn't mean they weren't "instrumental", in the sense of being the people who actually happened to get the work done. But that's different from "irreplaceable".