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Maybe just love C++ like me?
Maybe its all about having fun with what you are good at?
There is no need for people these days to stand idle and have a language pissing match - there is way too much choice these days, so you just pick what you think will do you well at.
I congratulate the authors of Paludis because they have done something that clearly they love without compromising on their dream to improve Gentoo. Even I can't make that claim