Pretty much all forms of racing (F1, Indy Cars, NASCAR, NHRA, etc. etc.) has gotten replaced with spec cars little really cool cars or innovation.
Like the six wheeled Elf in F1, or stock block/turbines in Indy car, NASCAR where I can't tell one car from another, one or two engine brands, drivers don't even shift now, etc.
Boring, some day the cars will be remote control.