[jawn]

I too had this same thought.

The only thing I could come up with is that, anyone implementing these at scale (fb's competitors) has already committed substantial dollar amounts to existing infrastructure.

To leverage the minor improvements in design that will come of this, they would have to start by rolling out new facebook style racks/data centers.

Whereas, for facebook any design improvements would be easier to implement on a larger scale.

Either that or they are just do-gooders, which I highly doubt.

[teaspoon]

And if competitors do adopt FB's infrastructure, they'll essentially be training their engineers to work at Facebook. They'd better have counteroffer packages ready.