I installed fiber to connect two pv inverters at home, over a distance of 120m (to avoid equipotential bonding, through an empty conduit underground). On the one hand, fiber is a nightmare compared to Cat 7a - you have to handle it carefully, there's a pulling grip attachment that's too thick to get through most wall holes, and you can't pull too hard or the fiber will stretch beyond a certain limit and degrade. On the other hand, our cable withstood a lot of force, was bent at 120° angles, and pulled through all kinds of dirt/water without damage. I just wish that I could crimp fiber ends myself to avoid all the hassle, but the equipment is just too expensive.

It's also interesting that 25m of pre-crimped cable costs almost the same as 125m, because the crimping seems to be the expensive part, not the cable material.