Any active/passive preamps with penny & giles pot?

The P&G pot is generally considered to be a premium part. But, like any part, a good designer listens to the result to determine if that part works best, rather than picking that part because it is good for marketing purposes. I talked to one designer who was anguished about a particular, mid-priced pot going out of production. I thought he could substitute something like the P&G pot and he said that cost was not an issue; in his particular design, the cheaper pot sounded better. I wonder how many amps touting the extensive use of Blackgate caps and Vishay resistors were designed with these components because of sonic, versus marketing, considerations.