Are you using Swift on the server, or just for iOS/Mac apps? I like Swift but it seems the consensus is that's nowhere near ready for server-side stuff. I'm leaning towards Elixir/Phoenix/LiveView for a project I have in mind, largely because I'm a (very) amateur developer and Elixir's way of doing things clicks with the way I think more than Node, which is the only other language I'm basically competent with. Plus, I guess with BEAM, the Erlang underpinnings, and Ecto's excellent PostGreSQL support, Elixir counts as "boring", well-tested technology.
I wouldn’t dream of using it on the server. It will always be a “second-class citizen” on the server. I use good ol’ PHP for my backend. If backend was my bread-and-butter, I might consider Rust or Python (both newer than 20 years, but also mature and well-supported). Maybe even C, if it was critical.
It is, however, an almost ideal GUI application language, and I write native apos.