I disagree with this characterization as incomplete. In the post-SUN era there were plenty of people who could build and administer a dozen forms of server OS+hardware, but a confluence of factors caused a greater tide to move greater numbers, in another way.

Some commerce did need to scale fast and easily, and AWS provided that with great strength. But I will add that the management and executive branch were constantly and relentlessly seeking to undermine the bargaining power, day-to-day operations authority, and pay of skilled engineers who could do that kind of setup. Not that it was easy or risk-free .. I did see some powerfully strained eyes and nerves on those individuals who built and ran those kind of servers at various times. But do not leave out the manipulative and gaming motives of executive management to dumb-down admin requirements, seize authority via legal means, and seek the lowest wages across borders while doing so ..