Probably, thanks to Greg Law's talk which featured here on HN, which I linked to in the post. But this is often the case with Linux kernel and GNU tool feature

Probably, thanks to Greg Law's talk which featured here on HN, which I linked to in the post. But this is often the case with Linux kernel and GNU tool features: they don't appear to have any marketing or sales professionals telling everyone about new features (unlike commercial offerings), which leaves us with many "hidden gems" (as people would say) in Linux + GNU. ftrace is another example.