Yeah, my analogy wasn't the greatest. Substitute "claw hammers" and "sledgehamemrs" and "deadblow hammers" instead. What excites me right now is there's a lot

Yeah, my analogy wasn't the greatest. Substitute "claw hammers" and "sledgehamemrs" and "deadblow hammers" instead. What excites me right now is there's a lot of great, interesting, useful tools available right now (React, Ember, Angular, to name a few). Maybe one or more won't ultimately pan out, but they're great opportunities to try new approaches and learn from each other. To build a web app with one of these new tools exposes you inherently to the risk that this tool might be abandoned in the next 1-3 years. It's up to you to weigh the risks of a new tool against its benefits. If long-term stability is something your project highly depends upon, then perhaps these new tools aren't the appropriate choice, and something like jQuery/Backbone is a better option.