I am a professional photographer (4-decades as a pro) supplying high resolution images for books, calendars, adverts,
magazines (including covers and double-page spreads), large posters and gallery framed prints, but shoot all my pro
cameras in jpeg (large-fine) format. Sometimes I shoot Tiffs in-camera, but 98% is in-camera jpeg. For many years I shot
in Raw only or Raw + Jpeg, but because I set up the Canon, Panasonic and Nikon pro bodies to capture images that
reflect my inner-vision on location, drastic post-editing is rarely needed so I stopped using Raw. However I would also add that in-camera
jpegs/tiffs shot on cameras such as D800, 5D Mk3; GH3/4 etc can be post-edited and adjusted a lot without degrading an
image enough to show on the printed page, even for high quality landscapes.