Make no mistake, Mozilla has contributed a lot to the Rust project, but the particular stage of maturity you mention was achieved some years ago :)
> Mozilla and the Rust Core Team are happy to announce plans to create a Rust foundation. Our goal is to have the first iteration of the foundation up and running by the end of the year.
(Later changed to
> the Rust Core Team and Mozilla are happy to announce plans to create a Rust foundation. The Rust Core Team's goal is to have the first iteration of the foundation up and running by the end of the year.
)
The blog post was drafted by the core and foundation team, however we did get sign-off from Mozilla on it.
Mozilla currently owns the trademarks that the Rust foundation plans to take ownership of, so they have to be involved to some extent. They have agreed to transfer it as mentioned in the blog post, and are going to work with us to make that happen.
The Rust project as an open source project with open governance has been pretty independent of Mozilla for quite a while now. However, Mozilla did provide some crucial services including trademark ownership, which is _extremely_ relevant to the discussion of forming a foundation.
Trademark ownership and is rarely impactful to the day-to-day workings of the Rust project, which is why I consider these irrelevant to whether or not Rust is still being "incubated" by Mozilla.