I wanted to ask the same question. Swift is a fairly nice language and seems to offer many of the benefits of Rust. As another commentator asked, I am also interested in details of integrating CLIPs.
I like the narrative, BTW, on why you needed to port your app.
Thanks! Mentioned it on the other comment - but we're using the Ort crate in rust and bunlding onnxruntime with the app. Definitely considered Swift and I know it's gotten a lot better since I last used it, but cross-platform support was what got us to use Rust over Swift.
As far as porting over goes, we are much happier maintaining the new version.