I think your wager is completely accurate. With Amazon as an example, depending on your team you could find yourself doing high-performance work in cutting edge

I think your wager is completely accurate. With Amazon as an example, depending on your team you could find yourself doing high-performance work in cutting edge languages on a globally distributed high-availability FaaS platform, or you could be using Perl 5.8 to make tweaks to a website that will only be displayed in certain parts of India.