We keep our landline for emergency purposes. My husband uses a basic cell phone but it's difficult for him - we are old.
We also use the landline for junk calls so our cellphone numbers aren't given out to every place we call. We get many solicitor calls but never answer them. It comes as a package so we probably wouldn't save any money be getting rid of it. If I could talk hubby into getting a smart cell phone we probably would do away with the landline.