You fail to make a general point about JS. Instead you make the point that jQuery is inadequate for large apps, and I agree. Just because you failed with jQuery dosent mean JS can't be used. I've seen Big JS projects go horribly wrong, but I've alse seen big C# projects go horribly wrong (And COBOL and ...). Every time the projects didn't have good tests, a CI server, nightly builds, structured code reviews, a modular and simple design etc. If you use all the good practices available, big JS projects become maintainable. It shines through in your post that you didn't do it close to right.