I didn’t realize that disable UV caused the UVs to completely be deleted. Is this how it’s supposed to work? I subdivided my model to level 7, 12 million polys. I did a UV Check and it gave me a texture and all was well. I disabled UV and then enabled UV and then did a UV Check. This time there were no UVs at all. I know this for sure because the Clr>Txt operation doesn’t work either. Is this a bug or is this supposed to happen?
Disable UV’s is supposed to delete them entirely, yes. The reason for this is that the feature is in part meant to improve performance by reducing the amount of data that has to be handled. UV’s are basically a second data set tacked on to your object’s points. So by deleting them, you greatly increase the number of polygons that can be pushed in real-time. 
This is NOT destructive, however. When you’re done sculpting and polypainting your high level mesh, return to level 1, enable UV’s again, and store a morph target. Now import your original model again. This will restore your UV’s. Now immediately create a displacement or normal map (if you need one). Then switch morph targets and return to the highest subdivision level so that you can transfer your polypainting to a texture using the UV’s that you started with.
Aha, good to talk to you again Aurick! Thanks again.