Lumafield sells CT scanners, so these posts serve double duty as advertising for their capabilities. Given how many times their previous posts have been shared I'm sure the ROI is great.
I think it depends what your goal with Duolingo is. I've had great luck using the app as smart flashcards, less so an end-to-end language learning solution.
1. We adopted chip cards quite late, so a lot of legacy hardware still exists - including payment terminals built into restaurant point of sale machines with a magnetic strip reader, instead of a separate card terminal.
2. Wireless card terminals are not common in the US, outside of things like Square or Toast readers. Readers are usually hardwired to the POS and aren't able to be "undocked" and carried around.
3. Outside of contactless, signatures are still usually required, and people are still used to having the receipt printer at the host stand alongside the terminal, instead of built into the card reader.
This is all slowly changing, and I honestly chock a lot of it up to stuff like smartphone payments (remember, we got Apple Pay before having contactless embedded in the majority of cards!) and smartphone-based POS systems like Square.
That's not true with most of the prominent examples you see. All autonomous vehicle fleets in California operate under the approval of the state DMV, and do things like publicize crash reports: https://www.dmv.ca.gov/portal/vehicle-industry-services/auto...