[AlexandrB]

> Why can't download the photos directly to a phone?

You can on some cameras (e.g. Canon 80D), but it’s somewhat cumbersome and eats batteries at a fantastic rate because the camera hosts its own WiFi access point.

[AWildC182]

Z6/7 does this with ease. Also, it has a touchscreen and can edit files on the camera but I don't know of anyone who bothers.

[petepete]

My D500 also has no problem doing this via SnapBridge. It was total crap when it launched (the app, the D500 was stellar from the offset) but has been gradually improving.