Running fiber will get you above 10Gb if you need that, and for longer.
It also completely removes certain electrical grounding issues, and makes connecting separate buildings easier (there are requirements for wires connecting different buildings, like a house and a detached garage; most people ignore these requirements).
It also completely removes certain electrical grounding issues, and makes connecting separate buildings easier (there are requirements for wires connecting different buildings, like a house and a detached garage; most people ignore these requirements).