Unmentioned is business phone use. The telephone is not much used. E mail is the com line. I deal with many young women who don’t answer their phones. You want to communicate with them it is e mail or nothing.
When you call 911 on your land line it dosnt matter if you become unconscious or if the intruder takes away your phone. the 911 people have your address. The cell phone wont do that for you.
IMO the phone company slid downhill when they stopped having a real person you can talk to. When I dial up with a problem , I dont want a message, I dont want to push buttons, I want to speak to a real person.