I've worked on different aspects of API management platforms for many years. One thing that keeps coming up again and again over the last year is the framing of "platform as a product." That has a lot in common with the guidance of treating an "API as a product."
I wrote about what this means and why it is so useful today:
https://sociotechnical.org/archive/why-x-as-a-product-is-a-useful-lie . I'm curious to discuss it further, too, if anyone is interested. :)