No doubt Bill,
The framers say don’t worry the sheetrockers will fix it,
The sheetrockers say don’t worry the tapers will fix it.
The tapers say don’t worry the painters will fix it.
When it’s all said and done, we end up have to scribe waves in the backs of our cabinets just to get them to sit flat against the wall. The concrete goes down hill. I started making cabinets with a 1/4" taper just so the front of the cabinet will touch the ground so that I don’t have to scribe each one in the field.
It’s rare that I can install something without having to scribe.
Another thing, studs 16" apart….LOL not hardly.
Figuring out how to do something you have never done is what makes a good challenge.