Within philosophy logic has remained approximately stagnant throughout it's entire history being based primarily on two state propositional logic.

Philosophy of science being the primary exception where propositional logic has been almost completly abandoned for bayesian logic and probability theory to fantastic success.

This seems to be true in many other categories of philosophical endeavor including epistemology and metaphysics as examples, where more formal academic philosophy seems to have lagged with the general advancement of societies overall knowledge.

Why do you think it is that philosophy has failed to encompass more general knowledge into it's methods and adapt and grow as a field?

Far too many times do I see discussions based on philosophical premises that are thousands of years old and too little do I see discussions based on these stagnant methodologies.

We seem to enjoy asking questions, but philosophy so seldom turns on the why we're asking the questions the way we do and are their better ways of asking questions in general based on what we have come to learn more broadly about the world.