A car that feels safe to be driving at 200 mph is going to feel more comfortable at 60 mph, compared to one for which 60 mph is at the very limits of its abilities. Analogies only go so far so I'm not sure there's anything to be learned from that though.

Yes, even for crud apps there's a huge variability in how nicely you can make them, and how many mistakes or footguns models make along the way. I'm very curious to what level these people are building to.