How does Flutter sit in the spectrum from Immediate mode to Retained mode? I presume it might provide an interesting erspective. On the one hand widgets are constructed on the fly, on the other it uses an OOP language to do so. So I suspect this maps to statefulness and statelessness?
Flutter is implemented in layers. The RenderObject layer looks very much like a traditional retained mode UI. It's possible to write Flutter entirely at this level, nobody forces you to use the Widget layer above it. The Widget layer is basically React-style, where the API looks fairly similar to immediate mode, but it uses caching and diff computation to reflect everything into the retained RenderObjects below it.
