Well Paul Graham wrote an article on it (http://www.paulgraham.com/avg.html http://www.paulgraham.com/avg.html). Essentially, I think the people who pick those

Well Paul Graham wrote an article on it (http://www.paulgraham.com/avg.html http://www.paulgraham.com/avg.html). Essentially, I think the people who pick those languages believe the extra stability/speed/whatever is gained from using it beats the drawbacks.