This doesn't need to devolve into a debate about LR vs CS. As many people have pointed out over and over in this forum, they are different tools that are more complementary to each other than they are supplanting one another. I use them both in a complementary workflow. jetcode happens to prefer a Bridge + CS workflow over an LR + CS workflow. Isn't that fine if that's what he believes works for him. My only gripe is jetcode pointing out that LR lacks in terms of layers, etc. Well, duh... that's why I send images to CS when I need to do that level of editing.
Actually, I know a few people who have a Bridge+LR+CS workflow... and I've been intending to learn more about that. They tell me it saves time on culling, since LR is pretty slow at that. LR, thus is really an advance ACR.
Anyway... regarding JPG file type. I don't store JPGs locally. They all get deleted. The only JPGs that remain are those that get displayed and shared through SmugMug.
When I print at home, I print through LR. When I get photos printed professionally, I send out TIFFs.