It's not really very low in the b&w world, is it? Color film has narrowed drastically, especially E-6 which I think is now down to five options (Provia and Velvia in two speeds each, plus CR200), but it seems to me like we're a bit spoiled for choice in black and white---a little less so since the demise of Efke, to be sure. There are, what, six or seven 400-speed films to choose from? (Two from Kodak, two plus XP2 from Ilford, Fomapan, two from Rollei if you don't count their infrared film.) I can't find a convenient historical catalog to compare to, but have previous generations of photographers really had more options than that at their fingertips?
B & W film is only lacking in the low speed category.