I'm from the generation that's fading fast... a Luddite of sorts. I guess if I was in a competitive business where, if I didn't answer a call immediately I'd lose money, I'd have a cell phone.
But, other than as an assistance in emergencies, I cannot think of one legitimate reason to have a cell phone. Hell, I don't often answer my home phone when it rings now... there's an answering machine for anything important, and for everything else, I'm glad I missed it! The phone is bought and paid for FOR MY CONVENIENCE... and I'll answer the damned thing when & if I please.
As far as I can see, having a cell phone is very much like voluntarily PUTTING A LEASH AROUND YOUR NECK. If you don't mind living your life on a leash... don't let me stop you.

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