I guess my note book is less "convenient" than notepad.exe. More moving parts.
We're just not on the same page here, sorry, I don't get it at all. It's like, are we counting the waves of the hands or what? I'm literally here now and I've just pressed about 300 buttons to write this message, are movements rationed?
"That'll be $15.77"
Option 1: I look in my wallet and find a ten and a five, put my hand in my pocket and grab a few coins, hand those over. The cashier takes the cash, taps a number into the till, finds the right change and hands it back. Is it arduous, hard labour and the end of the world? No of course not, but it is what it is.
Option 2: I look at my phone to unlock it and wave it over the thingy. Job done. I don't even have to remember to withdraw cash from the bank before I go.
It's easier and quicker, for you and for the cashier. The shop knows it too, particularly supermarkets - they encourage people to use faster payment methods so they can shave even a few seconds off a transaction and push more transactions through at peak times.
I'm not going to argue against cash existing, but "swipe the machine" works 98 times out of 100. For the other 2 times, yeah carry some cash on you. I think it's a very good system of last resort, but especially in places with contactless payments cash is less practical