I wanted to say Shen will never be relevant or useful without a change to it's licensing model, but looking at the website it seems like that exact thing has actually happened? It's hard to find concrete info so I'd love for someone to confirm, but IIRC Shen was encumbered by some sort of distasteful closed source model previously but it looks like that's no longer the case? Very excited to dive in if that's the case.
EDIT:
> In 2021 the SP kernel was returned to open source forming the basis for the S series of kernels on which this manual is based.
(https://shenlanguage.org/OSM/History.html)