Rooibos is an independent open-source project maintained exclusively by volunteers.
You might want to help! Get in touch via the slack group or raise issues.
https://github.com/georgejecook/rooibos-roku-sample
https://github.com/georgejecook/rooibos/blob/master/docs/index.md#getting-started
Yes, it's been used in production by quite a few folks, I'll provide a list in due-course; but there are 10'000's of tests in production in some very respectable companies.
I love rooibos, and always keep it up to date. I use it all the time.