Absolutely agree
with Phil statement. So many people seem to have this particular fixation with just NIT rating all the time. One of my favourite YouTubeers apart from Vincent at HDTV Test & Rtings is a guy from the US call STOP THE FOMO. He's acutally bloody good and seriously worth watching.
This is why LG curb their NIT rating down to have a decent balance of brightness vs detials. Its the same with IPS and VA panals. If your LEDs get to overly bright you are simply just going to "clip" everything around it hence lossing loads of finer detials within the picture. Otherwise you will just see very bright white lights as opposed to seeing the detials within those bright lights. So Yes having more dimming zones on paper is great but in reality it's down to how those dimming zones are being controlled by it's algorithms and CPU.
NIT RATING +DIMMING =balance of picture PQ and detials.
Anyways just some of my own throughs on the matter.