I just got upgraded to 10 Gbit internet the other week and was looking at routers, and it seems to be a surprisingly common configuration (or routers with 10 Gbit WAN and 2.5 Gbit LAN ports). I think router manufacturers are banking on 99% of people only caring about Wi-Fi and then being fooled by those “up to 7000 mbit over wifi!” numbers. And then due to scale those are the only chipsets that are affordable.