Usually Ctrl-F still works for me, but / almost always gets consumed by the stupid search that never works properly. But then that's usually because you're on a site with infinite scroll so even the Ctrl-F search is going to be limited, even if you are in the correct thread.

One thing is really dislike about modern UI design is where you see a headline that seems kinda interesting but you don't click on it right away. Come back a bit later and it's just gone. There was some A/B testing on the headline and now it's completely different, probably now all clickbaity so I won't be inclined to check it out.