I don't see why one would never shoot jpg again. True, for serious composition I certainly shoot raw for processing but in camera processing is so good these days that if you take casual shots the jpg image is good enough, even for a reasonable size print.
The proof in the pudding, just a snap out of camera.
Jpeg has its place even for demanding work. If in-camera performance is critical, or time to market/publishing, or storage space, then raw becomes an obstacle.
Personally I think it's a good exercise for everyone to shoot Jpeg every now and then, to get a grip on the compromises involved and make Jpeg work for you - in case you need it at some point.
Typically some of us (including me) get lazy with the white balance when only shooting raw. Direct-to-Jpeg demands more from the photographer.