pretty sure the big win here is:

1) low individual component cost (which is great when you need 100's of them for a datacenter build out) 2) no frills, high throughput non-blocking backplane which are normally only available from the enterprise grade network vendors at top dollar per individual component, and come with a mountain of features and bugs you DONT NEED 3) software defined networking stack: if you can imagine a scenario/feature that would improve your life, nothing but development costs will get in your way. contrast with enterprise vendors, which requires explaining the problem to begin with, and dangling a wad of money explaining how it will be worth their while to develop it