Sounds like a good thing overall, my biggest annoyance when I was writing a flutter app was the codegen for annotations (which sure it's better iteratively, but the first one was taking minutes), but if you move these seconds that happen once in a while to seconds during "hot" reload, you're just losing. Honestly, I think they should try to come with a faster codegen, maybe write it in c++ or rust and fix these problems, because macros aren't a silver bullet. They introduce complexity, a new "thing to learn" and sometimes lead to Turing complete machines.