Good morning,
<grouch>No, never; Cashless payment is just another cost to be covered in the retail price with no benefit to the customer. <end grouch>
Up until recently the card payment fees were too high, so many retailers had a minimum of say £10 and others added these fees on to the selling price.
Then the law came along banning this, so some businesses put up all of their prices, others ignored the law and charged anyway and some introduced a Service Charge that applied to all transactions including cash to cover this fee.
It is true that the retailer's card transaction fees have dropped a lot, quite recently Paypal introduced a 5% + 5p for very small transactions, Zettle offer a 1.75% fee on all card transactions. These are getting close to bank cash handling fees so are less of a barrier than in the past.
Even in a pub that is 17.5p on a £10 order or possibly 25% of the net profit margin. Of course this fee doesn't divide well, so it's easier to cover it with a 10p price increase rather than a 3.3p one.
So for businesses where the price is already at the limit of customer acceptance, going cashless might be the last straw, this not something that they would notice immediately, just one or two less customers adding up over time.
About 10 years there was a company called Cashbox, they would lend pubs etc, cheap cash machines and the pub would put it's own cash in the machine, Cashbox kept the interchange fee and the pubs saved having to put their cash into the bank.
You can get a cash machine for around about £1,500 if you accept that it is not physically secure against theft, fine for inside a pub where you can empty it at night.
Unfortunately the guy that founded the company ended up in court as he used to work for a bank and had done something wrong when setting up the business, so it was never clear if the model would have worked.
Once cash has gone or mostly gone, it would seem that transaction fees can creep up over time quite easily.
I also expect that the pay by phone option is going to come under regulatory pressure soon as it is becoming too popular and it is in effected un regulated short term credit.
Bye
Ian