There's no grand excellence to it. In my experience it was just almost the gulaggy boringness of it that'll kill you. You're just in this murk. And you're with other humans, but you lose all your human skills and it's just like you're in this plastic bag and you can't quite connect with people. You lose your ability to transmit electricity or something, and to receive it.
Credit or debit cards, for starters, are nothing short of shoppers' Novocain. Even in the age of digital purchases and virtual money, we still attach a special value to dirty paper with pictures of presidents on it. Handing some of that to a cashier simply hurts more than handing over a little sliver of plastic.