This is the problem here. User experience is subjective. It's based on who your users actually are. The myth, for example, says people don't read, they scan. In the general case, maybe, but I don't because I search for content that I actually want or need to read top to bottom. The footnotes touch on this but what good will scannable, text light design do for a site with articles directed towards experienced programmers? You'd have a job. User experience is all about the users and knowing who your users are is the fundamental step - not a general list of what to do and not to do.
The second point: that's incredibly annoying and to me the motive looks more like increasing eyeballs on the ads directly below the content and not really about the experience. I understand on Wikipedia, where a particularly long article may kill render times and scrolling experience.
Best thing to do is understand your audience. A 60 year old researching dental implants will need a much different experience than a 21 year old learning Java or a 5 year old reading fairy tales.
The second point: that's incredibly annoying and to me the motive looks more like increasing eyeballs on the ads directly below the content and not really about the experience. I understand on Wikipedia, where a particularly long article may kill render times and scrolling experience.
Best thing to do is understand your audience. A 60 year old researching dental implants will need a much different experience than a 21 year old learning Java or a 5 year old reading fairy tales.