I guess one question to ask is 'does it matter if the app is inefficient?' i.e. are these problems going to stop people from using Facebook? I'd argue that the

I guess one question to ask is 'does it matter if the app is inefficient?' i.e. are these problems going to stop people from using Facebook? I'd argue that the platform is way too big and too sticky for this to be a concern; they could ship an app that crashes every hour and people would still use it.