Should {{render}} reuse controller instances?

Actually my response was somewhat premature (or at least addressed the wrong issue):

It seems fine to me that a {{render}} helper would reuse a controller as a default, but I think you’ll want something tied to a specific model rather than just {{render 'someTemplateAndController}}. It’s not perfect, but keep in mind that today you can do {{render 'someTemplateAndController' someModel}}, and this form will not reuse an existing controller but will create a new one for you.