Wireless happened, I'd think. People started using wifi and cellular data for everything, so applications had to adapt to this lowest common denominator, and consumer broadband demand for faster-than-wifi speeds isn't there. Plus operators put all their money into cellular infra leaving no money to update broadband infra.
Wifi now can pretty realistically beat 2.5gbit/s while most Ethernet is still gigabit. It just seems strange to live in a world where the average laptop will get a faster connection speed over wifi than plugged in to Ethernet.
Ethernet is following suit to 2.5G which is otherwise a nonsensical step for ethernet speeds, I think this is further evidence that everything just follows wifi now.
