I don't know about any of this, but I remember the Sonic Unleashed demo was the most fun I've ever had with 3D Sonic (and Sonic in general aside from Rush, which is my favorite Sonic game).
Back then I got a PS3 from my parents but had no money to actually buy games, so I went crazy downloading demos lol Having easy access to game demos was actually novel at that time. And Sonic Unleashed had one of the best demos I've ever played, the first stage was incredible and I remember playing it over and over until I could consistently S rank it.
Unfortunately, when I finally was able to purchase the full game, it kind of sucked lol the first stage was still amazing, but the werewolf sections were the main meat of
the game and were insufferable. The other daytime stages got a little too complicated for me to master as well, and I ended up never finishing the game.
One day Sonic will click for me. Maybe.