[jlffwoymasdf]

tokio is so wide spread now such that Arc<Mutex<T>> is coincidentally the right choice.

I'm not saying that's a good thing.

[ben-schaaf]

Doesn't tokio have a single-threaded runtime where that's not needed?

[zackangelo]

Yes but Send + Sync is required everywhere regardless.

[vgatherps]

This is not true, you can run non-send futures using Tokio: https://docs.rs/tokio/latest/tokio/task/struct.LocalSet.html