I haven’t had a cell phone for 2½ years now. In my current situation, I can’t really afford to pay for a cell phone every month. Instead, I use an iPod touch and GoogleVoice. There’s wifi almost everywhere I go, and with Messages and the Google Voice app, I can text or email anyone. If anyone calls me, Google transcribes the voicemail to text, emails it to me, and I can email or text them back. If I really need to, I can usually find a place where I can pull out my laptop and call them. Or in an emergency, chances are that someone else nearby has a cell phone that I could use.
Do I miss having a cell phone sometimes? Yes.
Does GoogleVoice have bad connectivity sometimes? Yes.
Do I enjoy not paying $50+/month for a cell phone that I don’t really need? Yes.