you hit the nail on the head. The entire We are Robin movement (and Duke by extension) was a very compelling interpretation on the Robin as a mantle that opened up the identity up to everyone; which was the point of Robin as the archetypal superhero sidekick in the first place. It's not like DC forgot, they just invoked We Are Robin for the FS: Robin Eternal book with Tim. smh sadly typical missed opportunity on DC's part.