That assumes this uncorking is somehow continuous improvements.
IMO they are merely removing old software limitations on the battery/motor output that were in place to artificially separate the 75, 100 and P100 models.
In that sense, there probably isn't anything left to squeeze out of P100D - unless they want to risk warranty isseus (Tesla tuned down all Performance Ludicrous models a year ago or so, only P90DL apparenly has gotten their performance back after the court case)... Ludicrous+ is probably the best we'll get...
Maybe I'm wrong, but to me this uncorking business is just about removal of marketing/sales related software limitations, nothing more. P100D obviosly does not have any marketing/sales related limitations because it was always meant to be the very best it can be...