hmmm...this is a very interesting idea to get more elasticity out of the JPG's for editing. I've never used Adobe color space in my camera's becuase I want my JPG's to look correct right out of the camera and it makes no difference to the Raw's, but if you're shooting the JPG's as surrogate for the Raw, where you plan to process the image, then this makes sense. But don't expect them to look good out of camera.
I see this mistake made all the time. So many people change their color space to adobe thinking it's helping them when it's hurting them. It's usless for Raw and Hurts your unprocessed JPG's.
Never use Adobe color space for JPG's you want to look correct for display on the internet. When they get converted the colors look all funky.