Yeah, I was also wondering about that. My understanding is that ISO standards were necessary in the past to somewhat ensure that multiple implementations of the same language would be compatible with each other, Julia doesn't really seem to have that issue today. Would be very interested to hear of any other benefits.
ISO standards for programming languages have been essentially totally obsoleted for new languages. Open source is the reason: previously you'd only have proprietary implementations, so you'd need a standard to ensure they were compatible. Now the standard for rust, python, etc IS the default implementation. Bug for bug compatibility and all that.
