Love the idea and effort behind this, but concerned as to how Lego is going to react. The fact that they don't appear to hack the original software, but use a dual-booting arrangement is probably good news.
It's also used internally in LEGO.
https://www.lego.com/en-us/legal/legal-notice/fair-play
This side-steps some of the more sordid parts of Lego's own history but still it is a step in the right direction.