Anyone who tries to make the claim that "pretty much hardly anyone uses" is standing on shaky ground. It definitely has not surpassed Java in popularity but it seems to be quickly gaining traction at lots of large companies and is being used more and more. I was recently at Scala by the Bay in San Fransisco and it seems each year more and more companies are on board. If LinkedIn, Twitter, PayPal, Cisco, Verizon, and more are all using Scala I would hardly call it a niche language anymore.