[toast0]

Netflix's CDN is optimized to reduce space and effort needed by ISPs to install them.

They want a small box, because ISPs have limited space.

They want a single LACP group, because ISPs have limited ports, and to use only one IP address, because ISPs have limited addresses.

And they want to make it easy to plug in properly, so that they can reduce communication with the ISP.

These all add up to a dual socket node over two single socket nodes in one box. Although, as single socket capabilities increase, they may end up with a single socket node instead.