async was not "bashed into the language as an afterthought". The design of async took a lot of time, and was done very carefully to try and fit a niche that ver

async was not "bashed into the language as an afterthought". The design of async took a lot of time, and was done very carefully to try and fit a niche that very few other languages manage to do: zero-overhead, ergonomic, and safe abstractions for futures.