Usability and CX matter, irrespective of age but more so for oldies than the young. This is why I am so interested in decent research about Web design and there is probably no better place to look than Nielsen Norman Group.
This article is about the concept of 'the fold'. I think web designers think this is something from the dark ages when we all consumed digital on our standard PC screens. But no, the principle still applies in the days of tablets and smartphones
Summary: What appears at the top of the page vs. what’s hidden will always influence the user experience—regardless of screen size. The average difference in how users treat info above vs. below the fold is 84%.
OK, has that got your attention? It should have. If so then read the article. Dick Stroud