No, he realizes there are many other companies. His (possibly weak) argument is that unless you work for one of the five companies listed, you might suddenly fi

No, he realizes there are many other companies. His (possibly weak) argument is that unless you work for one of the five companies listed, you might suddenly find yourself working for one of those big five upon acquisition: "This worries me deeply, because as these companies get larger and larger, they eat up all the other sources of employment. Working at a startup that isn't one of the big 5 won't help if it gets bought out next month."