When I had my house reinsulated last year I took the opportunity to run cables from every room to a small closet, and then a run from that closet to the router. Had some… experience, learning how to wire in the sockets, and right now only my office is connected with a bit of patch instead of the switch I’ll eventually need to get the other rooms live, but it’s so much more reliable than it was with WiFi or poweline. Not to mention that those technologies only just kept up with the 36Mb VDSL I’ve been stuck on for the last 10 years. Having ethernet means I’ll actually be able to get the most out of the 500Mb FttP I’m getting next month.