Images of the first B760 motherboard have surfaced, showing off MSI's upcoming B760 Tomahawk. But, sadly, with B760 prices going up, we expect this board to compete with its predecessor.
A home switch that support 2.5gb to 5 devices is around $120 while the same for 10gb is around $250. Then recall that wifi 6e is pushing 5gb. The decision to move up from gigE is not so obvious. The incremental move to wired 2.5 and wireless 2.5-5 makes more sense. There just aren't that many people that need 10gb ethernet. Their needs can be met with a network card. Adding 10gb native connectivity is expensive and consumes a limited number of available channels.
Most people only use their LAN to connect to their router and share a sub-1Gbps internet connection, no point in wasting a ton of cash there upgrading to 10Gbps on a mid-range motherboard that may never even be used at anywhere near 2.5Gbps.
USB3+ on the other hand is most frequently used to move files between internal and external storage, which can quite easily go beyond 10Gbps when both the source and destination are NVME SSDs.