Massive jobs like this tend to require a lot of inter-team dependency. The best language is also one that everyone on the current team understands, and that ev

Massive jobs like this tend to require a lot of inter-team dependency. The best language is also one that everyone on the current team understands, and that everyone supporting it will understand. And that will grow in the direction of such a massive project. My 2 cents... Companies have to selectively pick where they are on the bleeding edge. Extra large projects aren't the best spot to play with the bleeding edge of new programming languages. (This is why COBOL stuck on so long for billing systems) The place for experimenting with new technologies are smaller self-contained projects where the risk is less, and the benefit can be more clearly explained.