To me, philosophy is like the trunk of the tree that sciences form. So to me is kind of part of science. So your question is will this trunk eventually stop and the “tree” only grows outward. I don’t know, but if I had to guess, I think the trunk will go on forever.

(Yes, this is simplified and science is more a network than a tree, but its structure is not perfectly homogeneous and philosophy kind of act as a trunk to me.)