One of the most cited things I've found online is to create final advertisements in InDesign to send publishing companies because it will result in better text quality.
Is this just for high end publications or when is this relevant? No publication I've ever worked for or submitted to needs the high end despite many asking. The "Media Kit" will say to submit with text files and whatnot but if I contact the actual graphic designer, the first thing they're going to do is flatten it to put into the publication.
Is this just archaic language and thought? When is it actually important to create a final advertisement in InDesign?
It seems very silly to me to create an ad in Photoshop / Illustrator and then rebuild it from the elements in InDesign for the final .PDF when I've yet to come across any print shop or publishing house that isn't going to flatten it anyways.