I'm sure many of them have the machines, still. The new kids pull them out from under the counter top and muse, "What are THESE for?!" Aside from what you said

I'm sure many of them have the machines, still. The new kids pull them out from under the counter top and muse, "What are THESE for?!" Aside from what you said about the embossed cards, I suspect the greater problem is probably the multi-part forms. I've seen embossing machines more recently than I've seen a stack of credit slips. For what it is worth, you can take a decent impression of a card with an ordinary piece of thermal receipt paper and a firm rubbing with a soft plastic like a Bic pen barrel or a thumbnail.