The former (Inversion of Control) is a general method and too unspecific to answer. I can only hint that one of the biggest caveats of async is brittle composab

The former (Inversion of Control) is a general method and too unspecific to answer. I can only hint that one of the biggest caveats of async is brittle composability due to missing cancellation routines. This will eventually be addressed. The latter (communicating sequential processes) is a formal language, but it looks like it is for IPC: https://arild.github.io/csp-presentation/#1 https://arild.github.io/csp-presentation/#1