Lord have mercy. I work with colorspaces. They are the bane of anyone's existence who is trying to do real photo or video work. Your article is terrifying.

How do we bring this to the attention of the people working on these decoders and renderer pipelines?

I feel like I should re-run your experiments with photos now, especially taking into account the unusual colorspaces used there, like XYB:

https://facelessuser.github.io/coloraide/colors/xyb/