We also have a much newer version however the workload of 'everything' has been a bit overwhelming since we aren't actually making a synth(thats just an example application) but an IDE, designtool and a framework.
We might, but only after we made our own. Our editor will finally break the barrier of inlining widgets/controls performantly. The editor is one piece with the visual designer (2 sides of a coin)
I notice that there is a bug when I open the console with cmd-option-J: a note will be triggered and stay there forever.
The audio worklet uses postMessages (https://makepad.nl/makepad/platform/src/os/web_browser/audio...), which is not GC free.
For those are interested, I am maintaining https://glicol.org/ which is also an Rust/WASM audio app in browsers.