A short explanation of what JPEG XL is or does at the beginning of the article would have been nice. Saying:

"""Google PIK + Cloudinary FUIF = JPEG XL"""

Before saying what it is, was a little of-putting.

It's a section header in an article written as a story. It's normal for those to not be understood until you read the section. And the explanation begins with the first sentence of that section. I don't think this is a reasonable complaint.

To understand that article required me searching for FUIF [1], PIK [2] and a brief explanation of what JPEG XL is trying to achieve.

I double down on my "complaint" - I'd call it constructive criticism - that article was poorly written. It's actually quite a good story that their Free Universal Image Format (FUIF) has achieved what it has. That's a great acronym, especially for a world that thinks JPEG XL is a good acronym! Why not put in in the article.

To save anyone else time:

[1] https://github.com/cloudinary/fuif [2] https://github.com/google/pik