Probably wouldn't use it, but i wouldn't boycott rf2 or any other game that decided to add it. First world problems, and all that.
Resume from replay, or save to continue later makes sense due to endurance races.
But rewind.... no, just no
Give me the option.
This is PC gaming. This platform is built on letting the player decided how they play the game.
If I don't want to use the flashback, I'll just turn it off. If I do want it, I'll turn it on.
And to the people that gatekeep sim racing by saying real sim racers don't use flashback and assistants, they can shut their mouths because nobody died and made them king.