I forgot about print style sheets (2016)
I worked at car shopping related site. We had just done the yearly replatforming to Angular, then the rereplatforming to make it server side rendered, and then the complaints started. It wasn't many, but I read our feedback report every single day and it was a few a day which is actually pretty notable. I knew from user testing and interviews that when shopping for used cars people would print out a few of the details pages and look at them side by side on paper. They were typically older but isn't like it was only old people who did this. Younger people who were more price conscious did as well since they really took their time. But after all the fancy new frameworks the page printed out on something like 10 sheets of paper when it would have fit on one. Most of them were blank. I managed to get a week of a dev's time to hack something barely usable together, but even getting that took some pleading.Next time you design a site that gets any use by a wide, tech illiterate audience, print it out and see how it looks. I guarantee you someone is printing it out and then cursing you.