I was considering looking into fibre just to see how viable it would be. The wires are so much thinner, but you have to have special equipment to bond them etc. But the old Cat wires are so easy to cut and add connectors to with a crimper and cheap too. Plus switches are so cheap these days, my favourite being Zyxel. Will probably wait until more then just PC motherboards support more then Gb Ethernet.

Are you using WiFi6? I've heard issues about it, such as distance and walls.