Here I am! I saw a recipe recently that said you couldn't overcook tenderloins. As for the
pork loin, I don't mind a little dryness, I just like pork cooked well done better than the briefly cooked chops, etc. I don't think it was any drier than pot roast.
A lot depends upon the cut used. I like the small rib end of the loin, especially when it still has the bones. I find that cut is a little fattier than the center and sirloin end. However, since I've moved here to the land of crappy meat, the bone-in roast cuts are almost impossible to find.
I buy only rib chops, not the ones with the tenderloin because they cook up better for me. If they have a mix of reddish and pink meat in them, I know they'll be better. Fortunately, that's the ones most people pass up.
So bottom line, literally, is that you might find the roast to be dry, I think it's a matter of taste.