I'm pretty sure the folks at GM and other auto manufacturers read these blogs -- so I think it's important that they document both what their customers are happy with, and unhappy with.
Because maybe they thought they could save a few pennies by omitting the glasses holder and adjustable shoulder for the seatbelt, and that no one would really notice. Yet, there are people like me who didn't even think to check for these things I assumed would just be there when I went from a 2017 to a 2019, and I'm fairly unhappy about finding them gone. I like my '19 over the '17 better in almost every way, it's a great truck, but for a vehicle I spend over 2 to 3 hours a day in, the little things in the interior matter to me.
When I buy a new truck in 2 or 3 years, as I usually do, I will at least go look at Ford and Ram instead of just automatically getting another GM over these little issues.