One of the biggest improvements in Windows Server 2012 is a feature of NIC teaming. At first glance, it is not a big deal; NIC teaming exists for years. Yes, there is a teaming feature, but not on all systems. Additionally, we can make such teaming only between NICs of the same brand and often the same model.
With Windows Server 2012 and later, we can make a team of any NICs in the system. Even more, NICs may have different speeds. Also, we can make more than one team in the same server.