For me I’d say Racedriver GRID 2008

Just something about the handling of the cars that feels good to me. A good mix between realism and arcade style.

Then there’s the rewind time mechanic that feels good and is tweaked based on difficulty (IIRC you get X amount of rewinds based on difficulty with the highest difficulty having no rewinds)

According to their total dataset size excluding duplicates, over 900 TB