Twitter Should Move Away from Ruby

Oh dear. The chattering classes are at it, talking about how the Twitter folks are dissing Ruby by announcing the replacement of some Ruby code with Scala code.

Please stop.
At the kinds of volumes that Twitter handles (and with what I assume is a somewhat scary growth curve), Twitter needs  to improve concurrency—it needs an environment/language with low memory overhead, incredible performance, and super-efficient threading. I don't know if Scala fits that particular bill, but I know that...