Removing the 2nd card slot was a very stupid move imo. It is one of the better features on my D7200. The battery/charger and eyepiece rubber are also different wtf? My D7200 must last a good few years yet. Might think to upgrade when they bring the 2nd card slot back.
I am surprised that no one else seem to know about this or care much about it.
This is a huge deal for some and not a big deal for others.
The new D7500 is actually very impressive, better AF, faster FPS, bigger buffer, better high ISO. flippy touch screen and 4K
Going down from 24MP to 20MP is a bit disappointing but not a huge deal.
Loosing one SD card is for me a big deal.
This is a simple but obvious sign to say we made a very good camera but its mostly directed at hobbyists and not pro work.
This doesn't mean you cant do pro work with it of course but removing the second SD means you cant back up your work while doing what ever you do for client and I think for many pro's this is a big deal.
Nikon wanted to make a clear buffer between the D500 and D7500, if you give the D7500 2 SD cards it is very good for everything and I think will really effect the D500 sales, this way you have 2 very closely matched cameras but each directed at a different crowd.
Looking at this from Nikon perspective this is almost a must so not to harm the D500 sales, for us the buyer its annoying seeing such a good camera crippled in some ways for paid work.
I think for most people this isn't a huge deal and for the price this camera really is an amazing piece of hardware offering a lot for the money, but its not for me.