Why is it virtually impossible to read long articles on a web browser? After 25 years, why do web designers need to create their own page transition mechanics for long-form articles, for example, when the basic purpose of the web is designed for reading documents? Why weren't multi-page transitions built in by default?
The same with photo galleries - after 25 years, why isn't there a standard user experience for viewing photos related to articles? Why are there a million JQuery photo gallery plugins?
In fact, why do we need to write CSS to create a basic readable document in the first place? Why doesn't HTML/CSS default to a high-end and legible reader experience out-of-the-box for basic text? (proper fonts & spacings, limiting column widths to 8-15 words max, etc..)
The reader-mode that web browsers are building in, that should be the default standard UX for HTML, and CSS should build upon that. But instead, it's a non-standard option.