The title in the article is literally "Async Rust vs RTOS showdown!" and the article shows "Embassy/Rust against FreeRTOS/C". There should also be a (2022) appended.

You just need to read the Reddit comments to see why this is not a useful comparison [1] [2].

[1] https://www.reddit.com/r/rust/comments/sik3g0/async_rust_vs_...

[2] https://www.reddit.com/r/embedded/comments/she3u9/async_rust...