I've seen flex, EMT or PVC nearly everywhere that I have been in Florida, but here in Virginia, they are still hardwired with Romex like in the original picture. Mine even had the Romex secured to the cold water line with electrical tape.
I agree with you about having a disconnecting means for servicing and physical protection. When I finished my basement, I went ahead and installed a disconnect and ran PVC to the HWH from the ceiling. I only did this because I wanted to. I may be wrong, but I am pretty sure that it's still not required here, even if the panel isn't within sight.
Of course, ranges and dryers must be cord/plug connected, but hardwired Romex to wall ovens, cooktops, dishwashers, disposals and water heaters are still quite the norm here.
