Parent was trying to be charitable. Apparently your time is quite valuable, so that it is a serious imposition to find oneself ahead of you in a supermarket queue. Since your time is so valuable, we'd all breathe easier if you would avail yourself of more significant time savers like the many grocery delivery services that are now available. Or perhaps you should hire a personal assistant to run your errands?
No need to be snarky. You can have efficient grocery shopping that saves everyone time if everyone paid by card/contactless like you see in NL or the Nordics instead of wasting time and resources counting coins and transporting them around when the digital alternative is so much more efficient.
No need to create more CO2 for the packaging and transport of groceries to your door if the supermarket is on your way from work anyway. Plus you get to pick the exact fruits and veggies you like yourself.
I assume you have a US viewpoint where grocery delivery is common but this is not a thing for consumers in Austria outside of the capital. It also costs extra so there's that.
I have never used grocery delivery; perhaps it has been available in my area for a couple of years. After we've been "locked down" for so long, it seems fortunate that we're able to enjoy the company of fellow citizens in the grocery store and various other locations where we all queue together. People have waited behind me in queue (and I've visited some benighted locales where queueing is a habit the public has not yet mastered), so I appreciate the opportunity to take the other side in this transaction. One character we don't need around is someone who feels like the line should move faster.
Either you vastly exaggerate the time savings of card payments, or credit card machines in your community are more reliable than what we have here. Don't brag too hard about living in the future, however, because here we often have the option of self-checkout, which typically is faster than even looking at a cashier. (Unless one of the oldsters who annoy you so has wandered into that lane and now contemplates the scanner as if it were the cockpit of the Space Shuttle. In that case one might offer assistance? Most of our self checkouts take cash!)
The day will come when all purchases will require the approval of several more parties than the buyer and the seller. We will not enjoy that circumstance, so people wiser (and perhaps less hurried?) than you will use cash as long as we can.
Grocery delivery services are mostly trash and don't save time; in my experience dealing with the hassles often takes more time than just driving to the supermarket. The delivery windows are too wide, and often too far in the future. They don't pick the right pieces of meat or produce. And if something is out of stock they pick an inappropriate substitute, not none at all.
In what universe