Why is there NEVER any talk of adversarial interoperability? Explicitly maintained and versioned APIs were a nicety, but not a necessity! Especially in this day

Why is there NEVER any talk of adversarial interoperability? Explicitly maintained and versioned APIs were a nicety, but not a necessity! Especially in this day and age of continually pushed code updates. Why just throw away Apollo's popularity and go dark, rather than simultaneously diversifying by adding support for open platforms that appreciate users (eg Mastodon) while also mitigating the damage Reddit can do by continuing to access the site like every other HTTP user agent?