I was rushing to the thread to post this. The new site, even after all this time, is dramatically slower to load content than old.reddit. Does anyone at reddit actually use reddit?

Another issue is pretending comment threads are modal?? If I click to read comments, it presents a sheet of comments that if you accidentally click outside them, they just disappear.

And they broke the back button, so when you go back to read those comments you accidentally dismissed, you don't land at your previous scroll position.