There are lots of geographically tiny problems in cities. One of the buildings next to where I live can get fiber but this one can't. Various apartments in this

There are lots of geographically tiny problems in cities. One of the buildings next to where I live can get fiber but this one can't. Various apartments in this building have fine connectivity but now a critical cable duct is full and someone may be told that "you can't get faster than 16Mbps, sorry" even if both neighbours on the same floor have 100Mbps, and that answer makes sense.