Y el que tiene razón en ese post es Kris Deering, que dice esto.

Remember, those values mean absolutely NOTHING when it comes to the movie itself. It has everything to do with the mastering monitor. The peak nit value of this title is only 181 nits and the average is 73. It is barely brighter than a standard Blu-ray master. I think it was a HUGE mistake to provide mastering monitor details for UHD. All it does it provide confusion.