The hard part is to improve perceived performance or resource overhead for general software, where each task outcome is tightly coupled with app state, eg. a pa

The hard part is to improve perceived performance or resource overhead for general software, where each task outcome is tightly coupled with app state, eg. a parallelize a slow task on button click and have guarantee that final state is coherent. Nothing out of reach, but doing that without compromising too much on maintainability is still an opened question.