If I may explain:
Version 2.00 didn't "add" the Garage Editor and save file editing. The tools, which required a computer to use, were released to the public sometime after the release of Spec 2.0, which was the real problem; since their public release, people abused them, which meant that every single update after Version 2.11 (apart from fixing DLC access issues) attempted to prevent the usage of modifications in-game. For the most part, they were successful, but some others found workarounds which didn't give them as much freedom than compared to before.
There were still some annoyances though that never got fixed, such as players corrupting a car's data that, when loaded in an online lobby, would cause all consoles connected to the session to soft-lock; quite an inconvenience to online lobbies indeed. In addition, even though the tools were released after the release of Spec 2.0, they still worked on older versions of the game, even the base version. It was because the tools were released publicly and were basically advertised all over the Internet that caused the experiences for some players to be dramatically affected.
Tools were also made for GT6, in which were made very early within the game's active life, I might add. Yet, the authors of these tools didn't release them to the public this time, and the only few tools released (post-2016) require a modified console to even take advantage of their features. PoDi was also super-quick to detect any would-be players using modifications online, as the game performs a multitude of checks when you're connected and signed-in.