Once again I'm doing some big renovations in a 75 year old house made in Hawaiian style, which means the internal walls are made from single 3/4" T&G redwood and all AC wiring either comes up from below into the baseboards, or runs down in wooden channels. The external walls are double T&G on 2x4s. That's how we roll out here in Hawai'i, or at least with the old houses. In 2009, the last time the joint was pulled apart (it has two living levels and it was pulled apart from below the main floor) I ran CAT6 up from the unfinished (but now finished) basement everywhere I needed it. So now my network is in the baseboards, coming up from below, and most of the horizontal runs are above the first level's drywall ceilings, and not accessible anymore. Recabling would be impractical. Now, much of the main floor is open, and walls are coming down (to be rebuilt). The attic is completely open, and although some walls will stay single-board, some will be new ordinary 2x4 drywall. Because of the way the house is built, it's much easier to go down into the external walls than it was to go up into them from below. At this point it will be trivially easy to come up from my wiring closet on the main floor (currently everything goes down from it) into the open attic, and then run down everywhere I please. I have 500' of CAT 6e on hand for the task. But it occurs to me that in this open and easily-wired space I should maybe run some fiber. I don't have any need to go fiber now, none at all. But maybe I will, or maybe somebody else will after I'm gone (I'm not young). The longest run from the closet would be less than 100', and most would be less than 50'. So I'm wondering whether it would make sense to pick up some terminated fiber cables, run them alongside the CAT 6e, and just leave them for future use. I'm really only thinking about this because right now running cable would be as easy as running cable in a new build. Suggestions, please. Thanks.