Isn't this just the problem of choice? If you really want an end to end cohesive development stack here you go: use google app engine with Java and gwt, all ja

Isn't this just the problem of choice? If you really want an end to end cohesive development stack here you go: use google app engine with Java and gwt, all java, all eclipse, all the way to the client side javascript / packaging etc. But I'm happy to have the choice to use python, and play with different client side javascript libraries to suit my various needs (I do use app engine). And maybe next week I'll use clojure on the server side next week and coffee script on the client; that's the beauty of choice. Overall if there were a single SDK for web development ala IOS development of android development, I would enjoy it less. I'll take the rough edges along with the additional choices and flexibility.