Reply To: How to convert Pantone color swatches to CMYK to make print-ready PDF?

It also begs the question, why use PMS colours in the first place if the intention is CMYK output.
Let us never forget that ink is gooey, analogue stuff, PMS gives the printer the tools to get the colour right, if CMYK is required instead then the ISO standards have given us all the tools to make that consistent too. They are different though, like apples and oranges.
Any conversion from one to the other is an approximation, always will be even if Adobe and Pantone designated the LAB based figures, the gamut of what is possible with CMYK does not cover all PMS possibilities.