I do think this is mainly aimed at developers used to more basic SaaS/PaaS services (like Heroku, which was mentioned a few times). Coming from that angle it re

I do think this is mainly aimed at developers used to more basic SaaS/PaaS services (like Heroku, which was mentioned a few times). Coming from that angle it really doesn't matter that S3 is not technically FTP, since it's more about "What do I use this for?". Using this list these users can quickly see that if they want to host files they should use S3 and not EC2. You are right that this simplification is not technically correct anymore.