>>1757>The author mentions how it is being pushed
By credit card companies. And with fairly limited success, as far as I can tell.
>and gives an example of where cash isn't accepted.
A few rare examples isn't really all that interesting.
I've not seen any evidence of a significant trend. Heck, many places seriously prefer taking cash, because of the fees charged by card companies.
Cash has three major advantages over third-party systems: it's ubiquitous, it's cheap to handle, and using it has very low barriers to entry. Until Visa and friends address any of those but the first, I'm not going to be concerned.
>An entire area that the article doesn't touch on is apps/online services.
That's more interesting, though I would view it as more of a distinct topic; those things provide a completely different environment, rather than just a replacement payment system.