I wouldn't say it makes jQuery redundant - the AJAX stuff is helpful (if replaceable) and it does a great job of e.g. $div.height() and so on, which can be a so

I wouldn't say it makes jQuery redundant - the AJAX stuff is helpful (if replaceable) and it does a great job of e.g. $div.height() and so on, which can be a source of cross-browser headaches without it. Though personally yes, I find I rarely use jQuery now I've got Ractive. The difference is the difference between declarative and imperative programming. With jQuery you have to describe the steps that the browser has to follow in order to do something (e.g. $button.toggleClass( 'selected' ), whereas with Ractive you're much closer to simply declaring your intentions (e.g. ractive.toggle( 'selected' ), assuming your template references that variable). It's an inherently more scalable approach (which isn't to knock jQuery at all - they're attacking different if overlapping problems).