The local dimming is better on this set compared to my 900F (85"). I had very noticeable blooming at certain times with the 900F. The 900H blooming is way less pronounced and the black levels are considerably better. I have the 85" version so I know the zone count will be different. However I believe the 900F had considerably more dimming zones than the 900H so I wouldn't read much into that at all. I can't answer your question on dark areas being crushed. I have watched a lot of movies (4K Dolby Vision/HDR) and regular tv and haven't had any issues at all with the picture. It has been amazing and definitely a noticeable improvement over my 900F.I'm actually a little surprised (disappointed?) by the local dimming section, more than any other. Watching the video, it's easy to see the square as it moves showing the zones. Digital Trends review said that it was hard to see it do that and their video supports that too. Also, they state: "There's a bit of dimming, though, and some small details are crushed in darker areas." What? How small? How noticeable is it? How much shadow detail is lost due to this?