I'm not surprised at all. When I design a web app, I'll design it around AWS infrastructure so that they're the "Ops" in my "DevOps" title. They handle everything about web app development that I don't care to.
(Obligatory) Apart from the single political point of control. AWS is to web apps what GoDaddy is to DNS and Verisign is to SSL.
In summary, it's find to be alert, but be sure to not over-generalize...