You might've laughed at that question as recent as a decade ago, but between expanding cellular coverage and affordable VoIP services, conventional landlines are increasingly redundant. I haven't had a wired phone in five years or so and I only know a few people who do -- at home anyway.
I acknowledge that fixed lines still offer an advantage in reliability and quality, making them ideal for businesses. But do you still have one for personal calls? If so, do you use it regularly or is it just bundled with your cable/Internet package and worth the few bucks a month to you as a backup?