Hang Li

> Should we also display a deprecation warning at build time when `EXTEND_PROTOTYPES` or `EXTEND_PROTOTYPES.Array` is _not_ set to `false`? That's a good point!

@chriskrycho @ef4 Thank you folks for the discussion and notes! Just addressed 1) & 2), could you help check if the latest commit covers all the information we want to...

Thank you @jrjohnson for sharing the deprecation experiences and gotchas. Contributions to the deprecation guide are heartily welcomed and appreciated as well ❤️ . https://github.com/ember-learn/deprecation-app/pull/1192

Hi @ef4 @chriskrycho , this RFC has been in FCP for over a week now. Let me know if there is anything else pending and what's the next step. Thanks!

@chriskrycho That's awesome! Fixed lint. Thank you for all the guidance, support, and discussions. ❤️ ❤️

Agree with removing from `recommended` rule. I am actually currently also working on drafting the [ember RFC](https://github.com/smilland/rfcs/pull/1/files) & [deprecation guide](https://github.com/smilland/deprecation-app/blob/deprecate-array-prototype-extensions/content/ember/v5/deprecate-array-prototype-extensions.md). Will open under main repo soon. Thank you for all...

thank you so much for reviewing @tniezurawski !