Glib comment? I think not. The question was in reference to using a Speed Graphic and a Schneider f/4.7 lens. At no time was it asked if such a lens would work for an assignment for Architectural Digest magazine. You state yourself that you used a '60's era Xenar F/4.5 commercially for years with no problems, "optically".
Speed or Crown Graphics with Schneider, Wollensak or Optar lenses have photographed some iconic images. The Hindenburg disaster, the flag at Mount Suribachi and Babe Ruth's last home run.
Here in Virginia is a huge museum of train photography by O. Winston Link. Mr. Link used Graflex view camera's with Optar lenses. Edward Weston used a crapped out $5 lens for many of his most famous photographs. St. Ansel often used convertible lenses that are much maligned by the "modern photographer". (exception Cooke and only because Adams used it)
Not too many posters here on APUG have a museum that takes up an entire railroad freight house. Or have a place in photographic history for their images.
No, I'll stick with my comment about lens snobs.