I used to work as an engineer in a company that fixed the ATM machines off site.
ATM machines are not something anyone should rely on.
Cash will always be king!!
Cash transactions can avoid taxes when deals are done "Cash in Hand"!!
Cash doesn't allow you to spend more than you have in your pocket!!
Cash doesn't charge you extra for using it like a credit or charge card. Shop are charged a handling charge by banks and that is passed onto you!!)
Cash feels good in the hand and when counted. (I have Scottish and Yorkshire blood so this may be instinctive!!)
Cash lets you buy things cheaper!!
Cash allows you to haggle!!