(of course not Note 5 without an SD card, and sadly the explosive features of Note 7s have not affected their e-bay prices yet)
...until I used an USB 3.0 OTG with a USB 3.0 USB memory stick!
Full nandroid backup went down from 35 minutes to 5 minutes! (Ok, 1900 seconds to 450 seconds).
This makes nandroid backups and ROM installations so painless.
I will have to wait for USB-C for my next phone. But why do I need one? Note 3 is pretty much perfect.
Especially with the amazing developer community here.