Exactly. Enough supports 10gbe that you might as well grab it; a few Mikrotik switches, some old enterprise gear, and an adapter gets you some good speeds.
Sure some of it might have been fine at 2.5 or 5 but those are relatively new and less commonly available.
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.