[ggregoire]

Exactly.

When I read those comments on HN, I'm really curious to know how people think you can build, scale and maintain a web app like Facebook. Do they think you can achieve it like in 2006, with a single scrip.js containing 100 000 lines of jQuery soup?

jQuery is fine for any web site or small web apps, but as soon as you reach the 2000 LOC, it's crazy to continue with it.