In my case my home network is part of the building network (4 apartments), my main server is in the basement (for noise and cooling reasons) and ~ 10 people in the building are using the network, making 1 Gbps sometimes too slow. My secondary server is in my apartment, so the sync between the 2 servers and the migration of VMs are constrained by the network performance, 10 Gbps would be a lot better, more than that ... not now, but in the future when 25 Gbps will become the baseline, I will use it.