The main difference between having a land line and a cell line (in the olden days) is 9111 service. (That means emergency response from local police and rescue services - they HAVE to have a way to find where the emergency is)
With a modern cell, onboard GPS tracker, etc, is just as fast as calling out your address by voice, if not even more fast.
These days, there is no reason to have a land line if you live near a major city (which I do- I live within fifty miles of the twelfth largest city on this continent). I have constant coverage in the micro/cell network, no matter where I go, locally.