At work we have oodles of 2U4N (8P) systems. Just going by eye I'd guess these have the same or even higher density than a blade center, while allowing more gra

At work we have oodles of 2U4N (8P) systems. Just going by eye I'd guess these have the same or even higher density than a blade center, while allowing more granular scaling, and being a standard form factor, and you get both front and back access to each node, so you can have whatever I/O you want, and you don't need a lift to handle the chassis.