I think that was a minority of the points; the majority of the points was in the space of the author not realizing something was possible in Rust.

Out of these points they were all for features which are steadily on their way to stable (or future things which are actively being worked on right now).

Very few folks use nightly -- many use it locally for improved developer tooling, but mostly everyone wants their crate to work on stable.

So I wouldn't say it relieves pressure that way.