That's great if you work down the hall from the guy that wrote the language but unless you're talking about a niche in house language when it comes to web development you're talking about what half a dozen people that you can claim that against?  And how many of those work at Google and the like?<p>The vast majority of people will never have the opportunity to be down the hall from that guy and for the vast majority of people a large helpful community will be infinitely more valuable.