As of two days ago, Gran Turismo 6 is now four years old. I still greatly enjoy the game for what it has brought us, but in my opinion, it is the game that had the most amount of potential to be the "dream Gran Turismo game on the PS3", but it fell awfully short from that.
Every new feature that was added in the game, with the exception of some, felt like it was just thrown in there without well-versed purpose. B-Spec came in too late, and even then, after all of the updates that the game had received by that point, credits weren't necessarily a problem for obtaining/upgrading cars to pass a race. B-Spec also wasn't helpful for the "endurance" races, speaking of which, I remember a comment from a Sony spokesperson somewhere on the PS Blog, stating that "they're getting that resolved, not to worry" or something to that effect. If I can find it, I'll post it here. But in the end, we never really got extended length endurance races of any sort.
I think the biggest problem with Gran Turismo 6's development was the upcoming release of the PlayStation 4. The game was officially announced in May of 2013, which by that time, Sony was rolling out the pre-development kits for the console (probably even earlier than that), and with Polyphony Digital being a first-party developer for Sony, I'm absolutely certain they were one of the first developers to get one. So there's no doubt that Sony had them get to work on a proof-of-concept for the PS4 (which is now a full product, Gran Turismo Sport), and at this time, they were still developing Gran Turismo 6. Fast forward to December of 2013, and the game was finally released, but it came a little time after the PS4's release date as well, which I'm sure hooked the attention of the general public.
So, during the time of Gran Turismo 6 receiving its content updates, they were working on what ultimately became Gran Turismo Sport. We've had members here (and elsewhere) drop hints that the content was probably demo'd in GT6 before ultimately making its first official appearance in GT Sport (the Hyundai VGT and the Toyota SF-R in particular). The Toyota SF-R was seen in an exclusive build of GT6 at the Tokyo Motor Show, but all that's left in the update files are some text references to it.
But we've had the addition of several great content additions in GT6 that we're probably going to never see until the successor to GT Sport is released, but I could always be proven dead wrong at any time. So many premium detailed cars, various new courses, and new car customization. GT6 was definitely the era in which speculation about the game's future content ran wild, especially with the release of Midfield Raceway; people were "predicting" what the next "remastered course" was going to be. Speaking of courses, the Course Maker also definitely came in too late in the game's lifespan. The PS4 was nearing two years old at that point, and the Course Maker also required not only a connection to PSN to play custom-made courses, but required the use of another device (Android or iOS) to even create your own courses. It was a huge turn-off for a lot of us, myself included, but there are other ways of creating your own courses, much better ways thanks to the community for releasing tools for this purpose.
I can't say that everything I said here is a fact, but it's what I've felt throughout the game's lifetime. When the online services are discontinued for the game, it sincerely makes me as to what's going to happen with the Course Maker. It's on the back of the retail game's case. Then you had one of the slogans: "The world is your track." The back end of my mind is hoping that Polyphony Digital will somehow still allow the Course Maker to be utilized to some extent- hey, I'd be happy with another Course Generator, like Gran Turismo 5 had.
Despite the shortened overall length of gameplay and the one-off feature additions, I still greatly enjoyed the game, and I still do. If they went back and added more custom options to the Arcade Mode (such as those seen in Gran Turismo 5; the game practically allowed you to create your own endurance race), it'd have a much greater replay value. I definitely enjoyed observing the game's development, though, saying this as I
just finished writing up on the GT Academy 2013 demo. 👍