@Feeds The proposed tag "fractional-differential-equations" has drawn three upvotes and no downvotes, so a positive response by common standards. I see there are forty existing Questions that combine tags fractional-calculus and ordinary-differential-equations, the natural alternative. So perhaps there is the necessary quantity of posts to connect up.

I'm inclined to give the relatively new user who asks for this the benefit of a trial to see if any new such posts get created in the requisite six-month run.