FreeBSD is a modern performant OS with broad hardware support. I don't know what feature you had in mind, but FreeBSD comes with kqueue and has largely the same core utils as MacOS, which isn't a lot but why not take the free wins you can get? Not to mention that if they manage to pull this moonshot off, porting the resulting work to Linux would be utterly trivial in comparison. So ingrained Linux fanboys don't have to worry, if this becomes a thing, they'll get in on it.