Dumped my landline, and now my cell phone is my main phone. Even at work we're on VoIP now. For the last year I had it, all I was getting on the landline were political robocalls and non profit telemarketers.
It used to be that people would argue that landline phones are more reliable than cell phones, but that's just not the case anymore. The landline companies are cutting costs like crazy. Verizon in particular
doesn't want to pay union workers to keep maintaining the landline network, and don't care very much if you're a customer of their old copper network, and would rather see you leave. landlines are just not part of their long term business plan anymore.
And it shows. I was a Verizon customer, and there were times when my landline was either dead or the line noise was so bad it was unusable, and it took days to get fixed each time. And the last two times we had a real emergency around here, our cell phones kept working and our landlines didn't because apparently, there's no staff regularly monitoring things in our central office. This isn't out in the sticks, either; I'm in a major metro area... just blocks away from FiOS service before
they decided to stop building that out, too.
tl;dr: if you have a landline, especially from a traditional phone company, dump it. They don't care about you, unless you're willing to buy a cell phone from them, which locks you in on a contract and makes them way more money.