In France, until the 60s, you had to have a university level in Science before studying Philosophy. That explains why you have a generational effect: usually old philosophers have a solid scientific culture whereas the young ones are closer to literature studies.

By the way, there have been a good number of philosophers working in the field of Philosophy of Science. The best know are Thomas S. Kuhn and Karl Popper, but you have also Henri Bergson, Gaston Bachelard, Ludovico Geymonat, Paul Feyerabend, Imre Lakatos and more recently, Michel Foucault, Edgar Morin and Michel Serres (and probably many I don't know of...).

"Dieu se rit des hommes qui se plaignent des conséquences alors qu'ils en chérissent les causes" Jacques-Bénigne Bossuet