I am reluctant to hijack this thread, but since you asked...
It's just how I was raised. If you want something, save for it and pay cash. If I fall on hard(er) times, then I can forego the purchase and keep the cash for another, more needful purpose. It would probably rock your world to know that I also do that when buying a car. I pay cash, then make payments into a savings account to enable me to purchase my next car. I do have a mortgage (owe less than $30k on a $400k house), but other than that, I have zero debt and none of my future earnings are committed. I have credit cards that I use and pay off each month... and a credit rating well over 830.
One of the biggest issues facing our kids today (and our country) is outrageous debt and the overwhelming sense of entitlement. I was raised to believe that if I can't pay cash, I then I have to wait to get "it', whatever "it" is.
(climbing off my soapbox... but you did ask, sort of.)
Uhhhhh what? I have credit cards and use them exclusively unless a place only takes cash and I'm not in debt. If I'm going to spend cash might as well get something back. That's why I have around 60,000 miles with AA and 100,000 points with Hilton..... Plus if your financing a phone with no interest for 24 months why shell all of the money now...... Makes no sense when you can use that cash to invest. I know such a radical idea......