When I first started in printing in 1980, one could open a newspaper and find 3-4+ pages of high-paying jobs in keylining, shipping, bindery, press, pre-press, sales, marketing, etc.
Now you will be lucky to find more than 1 column for min-wage bindery slaves.
I personally witnessed the death of art departments and keylining. High-paying jobs.
I personally witnessed the death of camera, stripping, proofing, and plating. very high-paying jobs.
And now I am personally witnessing the death of press. The highest-paying jobs in printing.
Good thing I left my very lucrative analog position for digital in 1990.
The internet had nothing to do with the obsolescence of stripping. Apple Computer and Scitex had everything to do with that. More recently, computer to plate removed another step in the process. As a buyer of catalog-quality four color process printing, I really liked that change, due to greater speed, lower cost and FM (frequency modulated) screening ... no more moiré patterns, which was a major problem for me, since I do a lot of apparel work.
Those are computer issues, not internet issues. The computer has led to the loss of many jobs now considered obsolete (like typesetter)- printing industry and otherwise.