When you create a template for a specific entry like a post, that template should always resolve to display that post, and only that post. It has no other use.

We can therefore consider pulling the data for the associated entry into the template edit view.

IE, instead of the canvas looking like this:

It would look like this:

The context can be very helpful when crafting a bespoke template for a particular piece of content. This would also represent another step towards aligning the Template Editor with the Site Editor.