I have to chime in that to some degree it's not going to be relevant to sign shops as most sign shops produce what they design, will send out files to printers who do not do any color correcting other than the software management. Shops hold on to files to other vendors, and attempt to keep as much of the production as possible. If a sign shop is going to deal with a designer, they must charge for the service of color matching, and be able to explain the digital printers inability to hit the Pantone (and most color references)
I have to send files out to multiple vendors and they all need to have the same reference. Some is a Matthews Paint or Akzo, some is EGL, PMS, Scofield, ICI or any other ink, paint or color reference. And occasionally they have to be transferred over to CMYK. CMYK and RGB is never going to work perfectly for a paint or ink match. Without a reference that a person can touch, it will bring varying and usually poor results.
I get drawings from architects and interior designers wanting to match paint colors for print. Try matching an ICI paint color to CMYK.. or Pantone...
I have lots of stories too... like designers spec'ing concrete color, acid stain and neon to PMS colors... it ain't going to happen. But in my type of sign design, with the vendors I push to bid on certain projects, they can match PMS fairly well with Matthews Paint, Akzo Nobel, and some of the digital print vendors. Maybe I am not so hard of a designer to deal with since I used to be a printer/production monkey, pulled a squeegie or 2 and sprayed a few cabinets in my life and trying to match colors on an Edge, Electrostatic printer, and paint. Matching was sometimes a chore if the designer was picky so I understand the complaint. But as a designer, color is an important part of design and some may want to pay for that, just not to the point of hurting the client, or a never ending back and forth.
Lamest ass thing is "calling it as you see it" with the typical 30" monitor and Illustrator designer. This is again the reverse self-righteousness hard at work with no clear argument but spouting out off nothing... the same can be said about the typical self taught hack sign shop who gets a bid and is clueless about the construction, design or print process.
Production is a skill, its more than design on my screen and press print, but to most sign shops and small business, that is good enough. Pressing print is typical of the clueless hack sign shop we all dread that are flowing into this industry. Your argument seems to have softened, but pushing the bar lower may not be what we need in the industry... just press print.... it's that easy.
oh that feels better...