Since the new Model::automaticallyEagerLoadRelationships() was been released I've thinking of the chaperone/setRelation method.
Wouldn't it be cool and handy if models are automatically chaperoned when needed?

Take a look at the following code:

// test.php
$board = Board::first();

foreach ($board->posts as $post) {
    dump($post->canBeEdited());
}

// Post.php
public function canBeEdited(): bool
{
    return $this->board->allows_editing
}

This code loads 1 board, multiple posts for that board, and then for each post it loads that same board again (with the automaticallyEagerLoadRelationships the code would execute 3 queries, still one too many).

It looks so logical to use the existing $board populate the $post when needed (aka, avoid a call to the database and use the existing board).

Now I get that you can chaperone the board in that first code block. But the reason to "automate" this is the same as for automaticallyEagerLoadRelationships, it's such an easy quick win to just activate this and it avoids so much repeated bloat in the code.

I'm not sure if this is even possible so I'm just dropping this as an idea here.