[sam0x17]

Twitter was (originally) also built on RoR. Not to mention GitHub is a rails app.

[hnzix]

It's also worth noting that Twitter's feature velocity fell off a cliff when they moved to Scala.

[fouc]

Oh interesting, I hadn't noticed that pattern.

[sam0x17]

I do think though there is a certain size companies like this reach where they go from innovative to being afraid to change anything lest the viral popularity goes away.