I'm surprised the author is so big on kerf but doesn't mention q/kdb+[1] at all, which kerf took almost all these ideas from and which has a much bigger user base.
It's definitely an improvement in reader comprehension. I'll admit one of the reason I didn't learn those languages is that they looked like gibberish.
Basically, he's big on Kerf because he's involved in the development. The above blog post will tie it with Kx and other APLs.
https://getkerf.wordpress.com/ is the official Kerf blog. And Kerf is not meant to be free...