Those compact layouts that exclude a delete key typically replace it with Fn + Backspace. I'm not saying there aren't scenarios where ctrl + backspace would be

Those compact layouts that exclude a delete key typically replace it with Fn + Backspace. I'm not saying there aren't scenarios where ctrl + backspace would be useful, however the majority of the time I'd argue that delete is available and should be used. Is the desire for a ctrl + backspace chord coming from some other system where this is the standard keying?