I’m a huge Swift advocate, even on the server, but I have to admit Swift for Linux feels like an afterthought sometimes.
For instance there are still no official Debian-based Swift docker images, and the “stdlib” (the Foundation module) is very often behind the (private) macOS’ one (still no support for async/await, lots of bugs that take time to be resolved, etc.)
Things do get better with time and developing for the server with Swift is a great experience, but it still feels a bit early.