Counterpoint: Photography is my main hobby and I use the SD card on my MBP very often. When I go on trips I very much enjoy having less different pieces of hardware to carry, less things to lose.
One of the target markets of Macs and especially MBPs is "creatives". Photographers are a part of those. On the MBP 16" presentation page one of the first selling points is that it has a great screen with great colors. The example is a landscape photographer. Of course, you could directly plug the camera in the computer, or have some external card reader, but why bother with carrying more suff?
I agree with the others that thunderbolt 3 is great, and I sure look forward to only having usb-c connectors. On my work computer I love that (it's a pc though). Of course, there's the "right cable" situation, but I suppose that whatever peripheral I buy will have the right kind of cable for it to work. My external monitor does DP alternate mode + PD and the cable that came with works.
That sait, I would miss the magsafe plug, it's probably one of the reasons why my 7 yo mbp is still going strong. I also think they could have left a usb-a port or two, just like they didn't remove FW800 on the first generation unibody mbp.