And the Swift community itself needs to work on making it officially available on more platforms. Officially, the only non-Apple platform that is supported is Ubuntu -- not Linux, Ubuntu. It runs on other distributions, but having “official” support for more platforms would be a big step towards acceptability. Most people I've talked to still consider Swift on Linux an experiment. Even C#/.Net Core seem to be more popular on Linux.
Having Windows support would make the language more acceptable by cross platform developers -- leading to more high quality libraries being written.
import Vapor
let drop = try Droplet()
drop.get("hello") { req in
return "Hello, world."
}
try drop.run()