[canttestthis]

> Facebook was written in PHP. Mark used one language he knew and a $300B company was built on top of it.

This example doesn't further your point at all seeing as they had to over time literally invent an entirely new language to make their PHP codebase scale. And on top of that FB went on to use a whole bunch of uncommon languages (Haskell, Erlang, D, probably a bunch of others I don't know about)

[nwiswell]

Well, as the counterfactual, you can't invent a buyer who will value your Clojure shop at the last funding round.

[lostcolony]

As a countercounterfactual, Zuckerberg spent $22 billion (original offer was less, but both due to growth in stock between offer and sale, and retention) for a company with only 35 engineers writing Erlang (Whatsapp).