What Rust did great was bringing affine type systems into mainstream culture.

However outside very specific use cases, where no kind of automatic resource management is allowed, no matter what, like in high integrity computing, or critical kernel code, approaches that mix and match both solutions are much more ergonomic.

Swift isn't the only one going down this route, we see it as well in D, Chapel, Linear Haskell, OCamml Effects, Mojo, Hylo, Koka, Veronica, and probably many other research languages being born during the last 5 years.

Because in the end, programming language ergonomics and expressiveness really matters for wide scale adoption.