> As sort of a sidenote: websites about UX seem to have the worst UX. Clicking the link, I'm not only met by a social sharing bar that uses 1/6th of the screen
This comment anecdotally reinforces my impression that UX people today (I assume you're either a UX people, or a people interested in UX) have a bias for full-width sites and browsers.
I rarely run my browser full-width (and I think many UX/UI designers rarely do anything else but full-width).
When I opened the page under discussion, I didn't see any social sharing bar at all, just editorial content. And when I read your comment I went "huh?" And then "oh."
So I full-widthed my browser, and saw what you're complaining about. (I didn't notice any scrolling problems. And I didn't notice a popup; that may be because of my adblocking addons.)
As far as I'm concerned, this site exhibits very good UX for this particular aspect of the site. If the browser isn't wide enough to display the sidebar, it gets moved to below the editorial content. That's so refreshingly respectful!
Most often I see "beautiful" sites that have to be sidescrolled if the browser isn't full-width. I do two things in that situation:
1. I turn off styles, which then makes everything flow within the viewport (It's 1990 again!) and moves all the blocks to the order that they appear in the html. Because all I care about are words and pictures, not features. Again, in this site's case that works fabulously, because the site makers ordered their blocks so that editorial content is first; abcnews.com is a good example where, if you turn off styles, the content of interest doesn't appear until you scroll way down the page.
2. Or I leave.