I fundamentally disagree with this. If an existing solution exists, one shouldn't try to create his own? Then why did Linus build Linux? There's also a lot to

I fundamentally disagree with this. If an existing solution exists, one shouldn't try to create his own? Then why did Linus build Linux? There's also a lot to be said for curiosity. I'm currently building an email client in my spare time, not because I don't think there are plenty of great ones already, but because I'm interested in programming with IMAP. I'll probably open source the final result, and I don't think there's anything wrong with doing so.