[throw5345346]

> The percentage of users that need this functionality is exceptionally low.

I am not sure about this -- I do know users who rely on post-cloning to update their sites. And I don't think it's unreasonable that this functionality should be fore.

But what I would say is, it's not a slam-dunk as a piece of generalised functionality, though it might be possible to implement it fairly completely for the core post types.

It would almost certainly need new core hooks. There are questions for example about who can clone whose posts -- do the editing and ownership mechanisms need updating, etc. And it might need reassessing in the Gutenberg era.

I've found post cloning plugins to be an adequate solution here.

[throw5345346]

> should be fore

= should be in core.

Goodness knows how that typo happened.