This is a good attempt, however way, way too glossed-over.
First problem is that nothing is said about Node or Sinatra in comparison.
Second problem is that no mention is made of the significant portion of all gems in rubygems (43,762 at last count) that are Rails-specific. Node is not there yet, and Sinatra can't use a good percentage of those.
Node is about JS. Sinatra is about lightweight/speed. Rails is about features.
That's true. I could easily write a full-length book on this topic. This article is actually meant for the people not using Rails and mostly reminding them that the invisible security stuff is important ;-)
First problem is that nothing is said about Node or Sinatra in comparison.
Second problem is that no mention is made of the significant portion of all gems in rubygems (43,762 at last count) that are Rails-specific. Node is not there yet, and Sinatra can't use a good percentage of those.
Node is about JS. Sinatra is about lightweight/speed. Rails is about features.