Optional deletion when not allowing existing.

Currently you can chose optionally whether or not to delete a referenced piece of content when you allow referencing of existing content, but you can't do so if you don't allow referencing existing content.

I have a client with a use case where they create new content and reference it via Inline Entity Form, but they also want to be able to unlink the content and create a new piece at a later stage while retaining the original piece of content, but they never have the need to reference existing content.

It appears to me that enforcing a deletion doesn't make a lot of sense, it should always be optional, or at the least the optionality of deletion should be optional.