[advertisement for proprietary software snipped]
I think that remark is unfair to Jacob. William had specifically
said that he did not know of any systems that implement a
binary format specifier extension, and Jacob replied showing one
such system. His reply was direct and to the point William had made;
I would not consider it an "advertisement" at all.
The fact that Jacob's software is proprietary is irrelevant to the
question: William did not say that he did not know of any "open source"
or "freeware" systems that implement the extension, he said that
he didn't know of *any* systems that had it. If I pointed out
that SGI IRIX's compiler has a %b extension as well, then would
you have said that my reply was an "advertisement for proprietary
software" ?
(IRIX does have a %b format extension; it just
happens to mean something completely different: it produces
a formatted byte count (e.g., %0.3b would convert 1024 to "1.000kb"))