Back 20 years ago or so, I had a purchasing agent for a realtor who wanted us to buy Quark so we could use their designer's native files (using an EPS was why the colors weren't matching what was on the screen, they said).
They got pissed when I told them A) looking at it on their computer screen wasn't showing them the right color and their boss had signed off on a proof with our paint match of their PMS color, and that 2) there was no way we were spending $4500 (going price for Quark at the time) on a program that we'd use maybe twice a month- and would have zero impact on the finished job. That particular person never called again- which was just fine by me- but we continued doing work for the office.