There was some controversy with its primary maintainer a while ago, not sure how it's progressed since. I can't speak of the technical side, however.
https://github.com/avelino/awesome-go/pull/1137
http://www.florinpatan.ro/2016/10/why-you-should-not-use-iri...
Re:Show HN: Goyave – Golang Web Framework
by faizmokhtar on Sunday March 29, 2020 @01:16AM
(#22716626)
the reason why it's not popular is probably because of the controversy it have before
https://github.com/kataras/iris/blob/master/README.md