If I understand the history of Porsche accurately, the rear engine in the 911 is due to it having been in the Bug and that is what Porsche could buy after he got out of prison.
If so, it hardly seems like a technology that needs to be preserved.
Moreover, are there ANY race cars that are designed this way? IE Grand Prix, nascar, etc.
If it were inherently superior, we would see others use it, ie like mid engine technology.
Lastly, did not the 550 feature a mid engine configuration?
Hmmmm!