I'd say some of your examples do a good enough job as is. "We wanted this thing, so they included it, but we didn't like how they did it, so they just abandoned it entirely instead" sure... proves something. Must be something only the "real fans" can see. I'm saying that there isn't real rhyme or reason to what PD include in their games beyond "what PD want to include in their games", and to selectively choose examples of things that people wanted that PD delivered (either "technically" or comprehensively) as proof to that end is just as fallacious as to say that because PD didn't include a Mk IV Supra that they just don't care about any of it. Certainly, following GT5's release it was obvious that PD were responding to criticism and were correcting things wrong with that game. But now we're another game past that, and an awful lot of reversions have been made since that other game, and now what little interaction there was back then is gone even against promises of more. So where does the claim of a casual link come into play? There's tons of evidence that Kaz is aware of criticism and requests and the like. There's comparatively little to suggest that awareness of that actively shapes the future actions in response if it doesn't go along with something that is already expected from a modern racing game, or something PD didn't already promise, or something being brought back that the series had already had. Especially notable when the ones who shout the loudest about how much PD listens tend to be the same ones who also shout the loudest about Kaz developing his games to his "vision" and damn everything else. But as far as car damage goes, how far down the rabbit hole do you want to go? Did fans simply want it, or does a huge franchise releasing a major game after an infamously protracted and expensive development period need it to even have parity with its direct competition? Fans wanted online play too. Did PD include that in the series because of fan requests, or because a cornerstone franchise releasing in 2010 (/2008) without any to speak of would have been a death sentence for any long term sales? Have PD been working on car sound generation because fans wanted it, or because the series has been getting a shellacking in reviews over that exact issue since GT3 because they have been so notably terrible (or maybe because Kaz himself wanted it)? Was that something he specifically didn't want to include?