Author here - I haven't updated this in a while, but am always grateful for the appreciative comments and emails I get when it gets rediscovered.

There's also usually two other comments:

1. Why isn't it funnier / meaner? (an early version had a couple more pointed descriptions).

2. Why aren't these names more accurate?

The answer to both is that I was trying to be help people form a rough mental model of what / how and in what context they would use the services - that they could then take as a jumping off point for doing their own research into.

Nobody is relying on my jokey 2 sentence description of these services to make deep architectural choices about their apps. What I have heard many many times though is: "Oh! I didn't realize that's what AWS Service X did."