Ok, I hate the changes. The endless scrolling in threads (rather than pages) sucked on the phone when I was trying to avoid vacuuming up data; it sucks on my computer since it often triggers a "scroll jump" when the page extends.
Aesthetically it is also not to my taste, to put it mildly, and getting this surprise the other day was not a pleasant experience. I'm not sure what the point of this exercise was, but the recent trend towards websites updating their interfaces to look "sleeker" and bungling it seems to be gaining momentum.