Questions,

Native Image is basically SubstrateVM ?

Is Sulong part of GraalVM? I never seen it mentioned in those release notes. I am just wondering if running the C extension task is even possible in real world.

Timeline on Project Loom?

And I know this is annoying, TuffleRuby, when can it run rails?

Sulong is GraalVM's LLVM bitcode interpreter, so it's mentioned under LLVM in the release notes. Its code base has been merged into GraalVM's main repository at https://github.com/oracle/graal.