Yep, no more these days. Kinda crimps innovation.
Cars just got too fast and danger with cars flying into the spectators.
I think Indy is limited to about 230 and Daytona about 200.
The insurance companies have a big say.
Of course with today’s technology Indy does 230 with a puny 2.2 liter engine on 20psi of turbo boost.