It works, but kind of inconvenient for things that aren't desktops... or you need a switch with sfp to act as a media converter everywhere you have devices.

And I have cat5 in my walls that was installed 25 years ago (way before it was my house)... That gets me to 10g everywhere I tried, so no reason to pull anything else.

I have a 10gbit LAN running over fiber with Mikrotik switches and cheapo Intel NICs. Works fine, and it makes remote disks quite a bit nicer than when they are over 1gbit.

I put some fiber in the walls just in case but there are not really many cases for this to be worth just yet