Most enterprises run VMware, Hyper-V, or XenServer. Almost always with Cisco Nexus 9K series switching. With that kit it's surprisingly easy, but not with the default Broadcom NICs, they generally don't have the required features. Even if they do, the advanced features often don't work properly.

I've seen jaw-dropping performance when it was set up correctly, something like 99% of the theoretical wire rate of 20 Gbps. With dual NICs and Windows 2016 we got nearly 40 Gbps because it can use both NICs at once! Amazing file copy times. I tested it with the usual 4GB ISO file copy test and it was so fast there wasn't even a progress bar!

Meanwhile, on most networks I see about 1.5-3.0 Gbps effective across dual 10 Gbps NICs. If you think about it, that's crazy bad. It means that in effect they're getting less than 10% of the available physical capacity for data traffic. The other 90% is being thrown away by "passive" secondary cables or by the lack of configuration on the switching layer.