For many kinds of tiny one-off hobbyist projects, why bother with servers or dynos at all?

Couldn't help but wonder if the (valid) cost and performance problems the author has with heroku will end up pushing devs faster to Backend-as-a-Service platforms like Parse, Firebase, or something like Amazon Mobile Hub (Lambda on Rails?).

(Note: not affiliated with any of these platforms, etc. Just a lazy mobile developer with lots of things that never make it to the app store.)