LOL I'd place my bets on IT geeks learning new technologies faster than old farts can. The first reason is durability. Id much rather have end users dealing with something stronger than fiber. Then there's not really any advantage to converting to a new desktop cabling technology as copper gigabit to the desktop fills most needs and fiber can still be ran on an as needed basis. On my desktop I have both fiber and copper connections but all our end users are on copper. Then there's cost. As a whole fiber tends to be more expensive to implement than copper. I can recall back in the early 2000s when people were talking about fiber taking over and seeing the demise of copper but yet here we are......same stories I used to hear about VOIP ending POTS back way back in 1999.