Rockchip SoCs starting with the RK3399 can do both USB3 and Ethernet.
The only board that I own that does both at the same time is the Pine64 Quartz64 that uses the RK3566. My Pinebook Pro doesn't have an ethernet port, Orange Pi 5 Max has ethernet but doesn't use the builtin controller to provide it.
I use NetBSD on a Pine64 RockPro64 and use USB3. It has been stable:
i see Quartz64 with 4GiB of RAM offered for $60. Sounds pretty reasonable for an SBC of this caliber. I mostly mean that something like the original RPi would be underpowered for USB3.0 and 1GbE, to say nothing of smaller devices like a $15 ESP32.