Agree, there are technical merits, jquery is not designed to separate model and controller code from the view. It can obviously be done but most jquery code i've seen are injected smack middle inside the business logic, selecting a few elements from the DOM based on their css-classes(?!) and then modifies them in place. I wrote shit like this myself a few years ago but the more i think about it today the more absurd it sounds. It simply doesn't invite you to write good code and almost requires another framework on top for you to do so. It's a much more low level tool than other frameworks, and might therefor be the perfect job for something as complicated as a spreadsheet.