At one point all of my transactions were done electronically (for convenience) until I moved to the UK. Since moving to the UK I've actually started using cash a lot more, I love the feel of coins and banknotes and it comes with a freedom.
Having 100% of transactions known by your bank, what you bought and where, it's yet another avenue in which bigger organisations get to know every little thing about you and over which you have no longer have control of. It's just another one of those things where society picks convenience at the dispense of freedom.
And now that virtually everything gets tracked, people are slowly becoming like little rats in a cage, continually monitored and always at the dispense of some faceless organisation. I don't like the implications of going fully electronic. It's just another movement forward to a society in which it's citizens are completely and utterly subordinated and at the whims of people privileged with more control.