Obsolete?
I bought a Model 6906 in the early '90s and carried it every day in some of the worst terrain & weather conditions you can imagine.
Definitely "severe-duty environment".
I was operating a lunch-wagon business in rural Miami-Dade County at the time, requiring that I carry cash deep in the boonies/B.F.E./middle-of-nowhere, and that pistol allowed me to survive (and come out on the winning end of) three armed-robbery attempts.
It concealed beautifully, performed flawlessly & never failed to do what it was designed to.
It's still my CCW gun of choice to this day.