It’s only a matter of time until we move to 8K and beyond, stressing copper’s bandwidth capacity. You’d need to trade the cost of running fiber vs running conduit. Of course conduit allows more flexibility. In the short term, before we develop reasonable cost fiber endpoints, conduit and/or CAT-6 will be the easiest to implement.

And we can debate the utility of running single or multi-fiber cable that may be dark for a while.