Probably one of the best, recent overviews of Swift on the server is by Tim Condon [0]. TLDR: nightly Docker images of Swift, shared libs (Swift Crypto an example), more Linux distros supported, Amazon's 2.0 release of Smoke [1] (which is probably involved in this runtime), all indicate that Swift's future on the server is probably bright, even if it is still early.

[0] - https://www.timc.dev/posts/future-of-server-side-swift

[1] - https://github.com/amzn/smoke-framework