I had (well, still have) cat 7 in the house, while venturing into fiber as well. 10GBASE-T switches are noisy and surprisingly power hungry. One big reason for

I had (well, still have) cat 7 in the house, while venturing into fiber as well. 10GBASE-T switches are noisy and surprisingly power hungry. One big reason for fiber is a home lab. Transferring large VM images etc. is so much faster. Ability to run iSCSI fast is also amazing. Single mode fiber is pretty nice. It's fast, has low power requirements and no need to worry about electrical issues. Prices have declined significantly. The only minus is that you can't have PoE, so the best option is to wire both. (Ok, there's actually Power over Fiber, but that's just crazy stuff https://en.wikipedia.org/wiki/Power-over-fiber https://en.wikipedia.org/wiki/Power-over-fiber. A huge fire risk.)