Landlines? What are those?
I'm a bit of an early adopter in general, however I think I hit this trend a bit early. I'm 38yrs old and have never had a land line in my name. I haven't had a landline in a house that I've paid rent/mortgage on. I've had a cellphone since the late-90's, and never looked back. The landline always seemed like a superfluous expense to me.
Couple caveats to that. I live in a major metropolitan area, and even on the outside edges of the county I have had good service. Secondly, I was OK with the lack of 911 support in the early days of cellphone usage. Not a problem anymore, but worth mentioning that it should be checked that 911 location support is available in your area.
Also, the wife and I have discussed getting a land line for emergency purposes. We decided to instead rely on a rigorous training program for the 7yr old. He knows how to unlock each of our devices, navigate to the dialer, and initiate an emergency call. We spot check him at random times to make sure he remembers, and has the presence of mind to make that call, both in terms of "where are mom and dads phones usually sitting", and how to physically operate the phone to create the call. If this is something you aren't comfortable with, then a landline with buttons to create a 911 call is 110% worth the effort IMO. That phone on the wall is always in the same place, and the buttons always look the same, and the handset always sounds the same. Use your own personal judgement here on if a landline is for you with kids in the house.