The "systems" label only means those languages can do a few more low-level things, nothing more. There's no reason not to use it for other things as well.
I know this is hammered to death on HN, but you could definitely argue memory safety is a reason not to use systems languages for anything else.
Granted though it means what you meant by "it". I read that as "a systems programming language", but if you specifically meant Nim then I think it can enable a GC.
