Currently our AngularJS application is 20k lines (between controllers, directives, services, and templates) and it certainly feels like a large application -- not when working on it, but when using it. AngularJS makes it very easy to build quite "large" (in the complexity/richness sense) applications with much less code than most other approaches, in my experiences.

Of course, if we are treating size as absolute, and basing it on lines of code, then 9k is pretty small. I mean linux has like 15m lines! It will take a while to catch up.