Yes there are more mature choices now, but Apple is serious about making Swift a c++ replacement and if they do that well, it actually has a chance of being a One Language To Rule Them All. Rust is too low level for people to use for Applications, servers etc, which is where Swift shines, and Apple is proving that Swift is viable as a systems language too.
I agree with all of that, I just don't believe it will matter outside Apple's ecosystem.
Developers on Apple ecosystem are the ones that would be using Swift like that, as it also provides a good to share code between apps and server side code.
Most likely Apple will also be the only one writing firmware or OS drivers in Swift, that is where Embedded Swift project started.
We have been here before.
The investment of Apple into a cross platform Swift ecosystem is a fraction of what Microsoft is doing with .NET, and even it isn't without issues.
Outside Apple ecosystems there are much more mature options for CLI and servers software.