I don't have the 1948 edition, sadly. In the 1981 edition, on page 112, he says "Panchromatic films can be made to simulate orthochromatic response by using a #44A (minus-red) filter, which passes only blue and green light."
I agree with you that the determination has to be made by the individual. By offering more choices we can give someone tools to weigh for themselves, rather than just poking about blindly. Given the advances in filter technology, there may be some merit in attempting the use of one, and possibly having another tool to use.
Just my two cents. I hope I haven't stepped on any toes. If I have, I offer my sincerest apologies.