I have a cell phone now, but kept the landline, and am glad that I did. In a storm, it still works, even with the lights out.
And if I'm placed on hold for a long time, or just have a long conversation, I don't have to worry about my battery dying. Sometimes, my son calls and talks two or more hours.
My cell phone is mainly for emergencies away from home or to call a taxi, etc. It costs me $2.00 a day to make calls from it and it goes through a $25 refill card pretty quickly. (ATT&T Go Phone)
I don't use my cell phone to store photos or for a mini computer, camera, or GPS. Some do, inc. the rest of my relatives. I don't do well on touch phones, probably due to peripheral neuropathy, which affects my touchy-feely abilities. My Go Phone has conventional call buttons to press to make a call. I don't (so far) "text." If I need to talk to someone, I call them; I don't sit around pushing buttons. I think people who do that while driving are a public menace.
I think it has a camera function. I need to get out the manual and see how to use it. My brother's fancy phone takes really good pics, so much so that he seldom uses his camera now. Has both macro and tele lens functions. Remarkable.
But I still favor the landline for clear reception and reliability without paying a daily use rate. But check your A&T bill carefully and be sure they aren't charging you for anything you don't need or want. They're awful to deal with and are VERY sales oriented.