I will also say that this is not an academic argument for me; I am in the middle of writing yet another immediate-mode GUI right now, for the game editor I am w

I will also say that this is not an academic argument for me; I am in the middle of writing yet another immediate-mode GUI right now, for the game editor I am working on. Every day I am freshly glad that I am doing things as IMGUI instead of RMGUI. Here is a (somewhat old) video explaining some of the motivations behind structuring things as IMGUI: https://www.youtube.com/watch?v=Z1qyvQsjK5Y https://www.youtube.com/watch?v=Z1qyvQsjK5Y