IMHO interest in ruby (irrespective of implementation) itself is declining.

A lot of people have realised that dynamic typing hinders maintenance of long lived projects and the tooling and dev experience with type safe languages have also gotten much better over last few years.

Despite having worked with Ruby for multiple years, I pick Kotlin/C# for new projects.

I know ruby has recently introduced support for typing, but until the wider ecosystem embraces type-safety it is gonna be an uphill battle to write type-safe code in ruby.