Ethernet also has 802.3az, so the link speed can be dropped when the speed isn't needed. I'd wager that most home and SME applications are going to be perfectly

Ethernet also has 802.3az, so the link speed can be dropped when the speed isn't needed. I'd wager that most home and SME applications are going to be perfectly happy just being able to burst to 10G for a few minutes at a time, and won't need to sustain that speed.