While DTM obviously is, I don't know if the current Super GT cars are really that much cheaper, so much as the idea was being able to spread the cost out more between 7 or 8 manufacturers and 3 series. Which hasn't really happened because NASCAR flaked out, nobody is joining each other's series and the joint races are tantamount to lighting a stack of money on fire.
JAF is still going along with them but DTM itself is pretty precarious right now so they inherently aren't as committed to the joint Class 1 regulations as they outwardly say.
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