> (This is totally unrelated but another thing I apply this question to is a page's/websites ability to support reading mode. You have straightforward pages that you can read wholly in something like Firefox's Reader View or Instapeper/Pocket. Then there are those pages that rely too much on some javascript library (sliders, read more, etc.) to display properly that gets broken when seen through reading mode.)
Sites that want to display readable pages don't have to work on compatibility with Reader View; they can just provide readable pages. I use Reader View mostly to work around sites' intentionally user-unfriendly design patterns (articles unnecessarily split across multiple pages), and only occasionally to work around presumably unintentionally bad design (Kill Sticky does most of that work for me). To the extent that that's true, sites are likely to be interested in being less, not more, compatible with Reader View.
Sites that want to display readable pages don't have to work on compatibility with Reader View; they can just provide readable pages. I use Reader View mostly to work around sites' intentionally user-unfriendly design patterns (articles unnecessarily split across multiple pages), and only occasionally to work around presumably unintentionally bad design (Kill Sticky does most of that work for me). To the extent that that's true, sites are likely to be interested in being less, not more, compatible with Reader View.