> desire for static types If you like static typing, then sure use something with static typing. I don't however, think that the criticism that "one day when

> desire for static types If you like static typing, then sure use something with static typing. I don't however, think that the criticism that "one day when you have millions of users you'll have to migrate to another language" is useful. Most startups will never make it to that level, and anything that saves them time in the beginning is probably worth it. If the average developer is only 5% more productive in rails than whatever java framework you're using, it's probably worth using Rails until you need to migrate (all else being equal). That 5% now makes it more likely you'll reach the point where you need to scale.