I also had a similar first impression from reading the name of the project. I thought it was going to be related to standardizing Ruby implementations / the Ruby language itself.

Same here, I thought it would be about a new version of ISO Ruby, or similar.

But it's typical for naming projects like this that they try to convey a fake sense of authority.

I could see that

It does make itself sound like it's the standard, when it has no relation to either formal (ISO) or living standard (the body of language tests that make multiple compatible Ruby implementations possible).

It's pretentious naming at its worst, IMHO.

And yes, some people might have been looking for language standard and be mislead by this.

A name like that makes me intentionally want to avoid it exactly because I don't want to reward misleading naming like that.