A canonical regex pattern vs Rosie pattern should be front and center on the landing page. I want to immediately judge whether it's worth my time to read more.

Yeah. This (linked from the examples page) is OK: https://gitlab.com/rosie-pattern-language/rosie/blob/master/... ... except for the terrible color scheme. The comments on a red background make this look like a diff.

I came to make this exact comment, lmao. And it sounds like I went through the exact same process too.