The supposedly bad example is perfectly readable to anyone familiar with Go. A bit of refactoring into first class functions, and you'd have an easy to read, idiomatic, easy to test, well typed code base with obvious places to adjust useful behaviors like concurrency limits.
Meanwhile the samber/ro example is incomplete (Subscribe(...)?), and the source includes some weird stuff: https://github.com/samber/ro/blob/22b84c8296c01c4085e8913944...
Not to mention heaps of reflection and panics: https://github.com/samber/ro/blob/22b84c8296c01c4085e8913944...
The functionality and expressiveness might be fantastic, but I would evaluate it very carefully before use.