It doesn't scale to zero, but the article was about how much more it costs running only serverless 0-24, but how hard it is to fiddle with Linux/deployment/CNAMEs/etc. (Especially that they have constant load, 10+M req/day.)

And so it seems to miss the obvious middle ground between raw EC2 (or Elastic Beanstalk managed EC2) and full on-demand Lambda, which is modern managed hosting (PaaS, Deis/Dokku/Heroku).