Google, like almost any other company of sufficient size, has a problem retaining great engineers who prefer smaller companies. Those preferences are not about the false dichotomy between "engineers" and "entrepreneurs". Mr. Ts'o enjoys a job in an established company where he can be paid well, work only on specific technical problems, work reasonable hours, etc. That's a fine choice, and the right one for many. It is, however, still exactly that: a job. People who start companies are not often looking for another job. Mr. Ts'o should be thankful that is so. Had Larry and Sergey taken his advice the company for which he works would not exist.