I'm not sure what you mean by _really able to be huge_ -- a large single page app? a site with a huge number of pages? # lines of code? I don't think there are any hidden limitations in Angular proper -- in fact it will allow you to organize source for a "large" project very well, and will perform very well -- but you have to be careful with scope digests (i.e. don't try to "compile" a bazillion objects -- but that is mainly common sense)