[lionkor]

It doesnt matter what The Book teaches - for example a majority of Rusts web-facing ecosystem uses some async, which means

1) tokio, which uses unsafe{}, and/or

2) async functions requiring all calling functions to also be async

So, really, you can't avoid it. The ecosystem is built on the idea of NIH, which is fine, if it wasnt for so many rust features you can abuse so heavily (e.g. macros to make your own language that I then have to learn).

There are a lot of issues with the complexity Rust brings.