I would argue that you're better off knowing 3 very different languages than 3 languages that are similar. That way you're more likely to be able tackle a prob

I would argue that you're better off knowing 3 very different languages than 3 languages that are similar. That way you're more likely to be able tackle a problem with an approach that's suitable. Or to put it another way, if I've only got 3 hammers of different sizes then everything will still look like a nail :)