Apple has been pushing Swift on Linux enough that I've been checking out its progress every so often. It will probably never get entirely free of ObjC but it's a nice enough language that I'd really like to be able to use it for cross-platform desktop applications. Having a pretty robust standard library and a stable ABI (currently just on macOS) are big plusses, in my book. Having a built in REPL is icing (delicious, delicious icing).