The title says "everything you need to know about networking on AWS". I wish it were this simple.
The article is well written, but it simply represents maybe 1% of what you need to know here. I would have called it "A simple introduction to networking on AWS".
I'd contest that this is everything that you need to know. Or perhaps more accurately, everything I need to know.
It's certainly not intended to be exhaustive and I am definitely not a network engineer but I think you could operate at a reasonable scale within a single well laid out VPC. Of course there'll be a point for peering etc. but you might not need that.
The article is well written, but it simply represents maybe 1% of what you need to know here. I would have called it "A simple introduction to networking on AWS".