Reno has a great climate for high quality apples. It’s got hot days in mid summer, cool nights and cool in fall. That and control of water are the keys. I believe Neil has reported 27 brix. That’s amazing for an apple. Reno averages only 7.4 inches annual rainfall. To grow apples or almost any fruit will require significant irrigation, probably 20-30 inches per yr depending on soil and application method. On shallow soil a lot can be lost below the root zone.
The negatives in Reno are frequent freezes and a short growing season.
Now Vegas is another story. Apples would need 2-3 x as much due to the much longer season and extreme heat. Nigras would likely grow a lot if they got lots of water. With the usual or what jujubes survive or even thrive on most fruits won’t grow much all summer.
Both are good for high quality fruit due to lots of sun, little rain, and heat when needed.