Very insightful post. Although my work is mainly about audio not GUI, I still learn a lot from your idea. For my audio work, I also use declarative style and di

Very insightful post. Although my work is mainly about audio not GUI, I still learn a lot from your idea. For my audio work, I also use declarative style and diff algorithm for updating the audio graph. But when rewriting it, I found sending messages is also very convenient: https://github.com/chaosprint/glicol/tree/main/rs/synth https://github.com/chaosprint/glicol/tree/main/rs/synth This might be interesting for you as I found that you also have a synth project (https://github.com/raphlinus/synthesizer-io https://github.com/raphlinus/synthesizer-io). Admittedly, there is still some way to go for this audio lib. Will further study this post when I got more spare time.