Make the text easy to read for all

When I started designing for the web many many years ago this was an issue. It’s still an issue now. There can be nothing more fundamental than allowing people to be able read that which is delivered via the screen (I’d also add, the freedom to make that text selectable, another pet peeve, and usability problem). I find it an increasingly serious problem on mobile, but it’s still rampant on the large screen as well.

And it’s to just a problem of contrast as stated in the article linked to below, but also there seems to be a tendency to return to ever smaller type sizes, which on mobile becomes not just unreadable but also makes user interaction al the more challenging.

There’s a widespread movement in design circles to reduce the contrast between text and background, making type harder to read. Apple is guilty. Google is, too. So is Twitter.

Typography may not seem like a crucial design element, but it is. One of the reasons the web has become the default way that we access information is that it makes that information broadly available to everyone. “The power of the Web is in its universality,” wrote Tim Berners-Lee, director of the World Wide Web consortium. “Access by everyone regardless of disability is an essential aspect.”
But if the web is relayed through text that’s difficult to read, it curtails that open access by excluding large swaths of people, such as the elderly, the visually impaired, or those retrieving websites through low-quality screens.
How the Web Became Unreadable

And I have to practice what I preach here, the text size is become too small.