I have two lines, ine for personal, one for work as I telecommute. Also have a personal and separate business cell. I much prefer the landline when at home...more comfortable handset (extension in every room) and I use a cordless headset for work. The cells aren't comfortable (have both an android and an iPhone) for long conversations, have only so much battery life and sometimes bad connections. Definitely prefer landline at home, cell when out of the house only.
Plus honestly cell only with no landline seems so millenial.