When your jvm vendor is IBM?
I don’t see other reasons. OpenJ9 had quite good polyglot vm Platform. I am not sure how well it is now compared to the Oracle GraalVM.
As a Singular developer you don’t really care about your jvm vendor.
Maybe if you already have a lot of IBM specific tooling OpenJ9 will be a nice choice.
When your jvm vendor is IBM? I don’t see other reasons. OpenJ9 had quite good polyglot vm Platform. I am not sure how well it is now compared to the Oracle GraalVM. As a Singular developer you don’t really care about your jvm vendor. Maybe if you already have a lot of IBM specific tooling OpenJ9 will be a nice choice.