I miss working with Erlang.  I still think Ruby is better for getting something out quickly for many businesses that charge for a product(†), but Erlang was very interesting, challenging and generally a good community.<p>† If you charge for a product, you don&#x27;t generally have to worry quite so much about scaling because you make a lot more money per user than some site that&#x27;s all about ads and trying to keep the cost per user really low because the ads don&#x27;t actually pay all that much.