Is it really that expensive? Many poor places are now having optic fiber for even remote areas. Algeria is having its speed boom (https://www.speedtest.net/global-index/algeria#fixed). I have been through some remote poor areas in Asia who had optic fiber with "crazy" speeds (ie: 500mbs).

I wonder if the price of fiber now is just too low that it's very viable to install at scale even for low-density areas.