I teach an introductory graphic design course (PS, Illustrator, InDesign) for Media Arts students. I try hard to re-evaluate the material and grading criteria regularly so that I'm focusing on aspects they'll realistically run into doing the work and not just dogmatic repetition. Suffice it to say that I have historically spent a lot of time talking to my students about why JPEG and WebP are not appropriate formats for print production.
I understand the fundamentals here, but realistically is this still a problem? I stopped making a big deal about CMYK vs RGB some years ago because the offset printers I work with for my own work didn't seem to care that much anymore since their RIP output is functionally identical. So is it the same for using a JPEG in your InDesign layout these days? Especially considering they mostly work with stock photography that comes to them as a JPG regardless?
EDIT: When I say "I understand the fundamentals here." what I mean is that I understand the concepts of lossy image compression and generational loss. But when I was coming up and learning desktop publishing principles, JPEGs were considered fundamentally incompatible with offset print production regardless of their compression level (full color JPEGs could come grayscale in production) and a designer submitting a Quark package containing JPEGs would have their work instantly rejected by offset printers for production. So I'm not asking whether JPEG (I confess I just threw WebP in there) is the best choice for print production (which is a much bigger conversation with many competing factors), I'm asking if JPEG is still fundamentally incompatible with the offset printing process the way it was a decade ago.