Meeting real-time guarantees pretty well isn't good enough for a DAW. Not without a lot of buffering (and therefore latency), anyway. The WebWorker proposal is

Meeting real-time guarantees pretty well isn't good enough for a DAW. Not without a lot of buffering (and therefore latency), anyway. The WebWorker proposal is interesting. If the worker has its own heap and realtime scheduling with a correctly configured GC, it would be a big improvement. Getting the different implementations to work consistently enough will be challenging, though. Meeting realtime deadlines is difficult enough when working in C with a known OS and audio stack.