I'm actually surprised at the amount of 2.5/5 gear I've been coming across lately, especially in the 2.5 space as more ISPs are pushing for gigabit+ to the house.

Verizon's been issuing a wireless router with 10G WAN and several 2.5G ports and MoCA support that includes a 2.5G adapter and they use that across all their current connection types. I was delighted to see that when I got the router a couple years ago.