I gave up a landline simply because nobody ever called me on it anymore except for telemarketers and surveyors. I’ve had just a cell for a while...and might get a landline in the form of VoIP service.
I use Vonage and as long as they can stay in business I'll continue using them and my cell phone. Verizon landline called me a month ago asking me to come back and saying they could now offer lower pricing. I enjoyed telling the caller they should have offered me lower prices a few years ago instead of after the fact.