Landines require wires, which makes them more susceptible to going down during storms.
This myth that they are in any way more reliable than a cell is erroneous at best, and is generally a defense mechanism of people who don't like change.

We ditched the landline years ago and have been using an Obi with a google voice number.
$40 for the box, free phone service in the US, Canada, Mexico and a few other places I never need to call.
Did I mention that there is no monthly fee?

I connected the box to the house wiring in the last house so all the jacks would work, but got sick of seeing the dinosaur on the wall, so when we moved I just hooked it to a set of double receiver wireless phones.

__________________
On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif