I'm in this boat and it kind of sucks. I have a lot of savings after a few decades being a programmer, but my credit history consists of nothing but a few late bill payments over the years - never had a credit card or a house or car loan. To rent an apartment I always had to get my brother or father to co-sign the lease, or else I would just rent a room from somebody (which usually never required a credit check). I can't get a credit card from a bank or even cards from stores.

On the other hand, it kind of doesn't suck since I have no debt whatsoever, and I just bought the house I'll spend the rest of my life in for cash. For the last fifteen years I've driven cars I bought for cash on eBay or Autotrader. There were times in my life when if I'd had access to easy credit I would have dug a big hole for myself, and the (very rational) unwillingness of anybody to lend me money saved from financial disaster.