Thanks for sharing this! I wrote it.

Here's the idea: Code readability is highly subjective. What looks like gibberish to some is crystal clear to others.

But is readability more than just familiarity?

I think so and I think their is more than one type of readability. Newcomer Readability and Experienced Readability. And sometimes, they clash.

Which one should programming languages prioritize? Newcomer Readability helps adoption and is closely related to familiarity. But Experienced Readability is all about expressiveness.