Last commit was 8 years ago? Does anyone use it?

Glancing at the sample code, the API looks quite pretty. It fits nicely with the "imperative-ish C++" idioms throughout most of the Arduino SDK. The reliance on try/catch statements is peculiar. If I'm doing something that demands a multitasking kernel, Arduino is never the first thing I'm going to reach for. Looks pretty nicely done, though.