[dstein]

Using Jquery to do ajax requests and updating part of a web page is emulatimg state over http.

Coffeescript, SASS/SCSS are just examples of making the Rails stack even taller.

I don't have any experience with Sproutcore or Cappuccino but both look like clientside-only frameworks and would only extend the state & stack problems that I already dislike.

[sunchild]

"Using Jquery to do ajax requests and updating part of a web page is emulating state over http."

Only if you use it that way. Also, Sproutcore/Cappuccino are not add-ons to Rails. They're stand-alone client-side frameworks.