i’m not an expert so take my view with a grain of salt. The rear of the car is way too stiff so all the energy is sent to the driver rather than crumpling the rear. the drivers have complained about hard hits
here is a list put together by nacarman
1). In March 2020, William Byron had a right-rear impact testing at Fontana. Chris Rice: "We've heard through the grapevine, some concerns about William's crash and the force that he took in that wreck."
2). After a last lap crash at Atlanta, Bubba Wallace called the hit the hardest of his career
Bubba Wallace: "That was the hardest hit I've had. I think that was harder than Pocono."
3. After a crash at Talladega, Bubba Wallace implied on team radio that his crash was even harder than the one he suffered at Atlanta
Bubba Wallace: "Here's a new P1... I don't know if I can take many more f*** hits like that."
4). Christopher Bell had crashes in the All Star race and testing at Pocono
C-Bell: "Both of them from the outside looking in does not look like a hard impact, But it absolutely felt way harder than any other car that I’ve backed into the fence before in NASCAR.”
5). Joey Logano crashed near the finish of the Coke 600. He called it the hardest crash of his career
Joey Logano: “I’ve never hit harder in my life. That was horrible, and it hurt really bad... These cars, they hit harder than ever. They hit really, really hard. They’re super solid. It hurts.”
6). During qualifying at Pocono, Kurt Busch crashed with the right-rear at an impact over 25Gs and suffered a concussion. It was said his injuries were the culmination of several hard hits at Atlanta, Darlington, Atlanta, and finally Pocono.
7).Kevin Harvick: "Every time I hit something, it's a lot harsher than any hit I've took in any of the other cars. The only thing I can compare it to is hitting a concrete wall, compared to what it used to be."
8). Ty Gibbs Watkins Glen: "I felt like it was a pretty hard hit for as soft as it was. So hopefully we can figure out how to make these things softer and preserve the lives of the drivers. I feel like that's the most important thing. I feel like we're seeing it from everybody."
9). Denny Hamlin's comments after his August Daytona crash: "That was certainly the first real big one I've had in this car. Everything they've been telling us, all the other drivers, it's true. It's legit."
10). Alex Bowman called his crash at Texas "the hardest I've crashed anything in my entire life." He finished the race but concussion symptoms will keep him from racing at Talladega
there is more too
here is a list put together by nacarman
1). In March 2020, William Byron had a right-rear impact testing at Fontana. Chris Rice: "We've heard through the grapevine, some concerns about William's crash and the force that he took in that wreck."
2). After a last lap crash at Atlanta, Bubba Wallace called the hit the hardest of his career
Bubba Wallace: "That was the hardest hit I've had. I think that was harder than Pocono."
3. After a crash at Talladega, Bubba Wallace implied on team radio that his crash was even harder than the one he suffered at Atlanta
Bubba Wallace: "Here's a new P1... I don't know if I can take many more f*** hits like that."
4). Christopher Bell had crashes in the All Star race and testing at Pocono
C-Bell: "Both of them from the outside looking in does not look like a hard impact, But it absolutely felt way harder than any other car that I’ve backed into the fence before in NASCAR.”
5). Joey Logano crashed near the finish of the Coke 600. He called it the hardest crash of his career
Joey Logano: “I’ve never hit harder in my life. That was horrible, and it hurt really bad... These cars, they hit harder than ever. They hit really, really hard. They’re super solid. It hurts.”
6). During qualifying at Pocono, Kurt Busch crashed with the right-rear at an impact over 25Gs and suffered a concussion. It was said his injuries were the culmination of several hard hits at Atlanta, Darlington, Atlanta, and finally Pocono.
7).Kevin Harvick: "Every time I hit something, it's a lot harsher than any hit I've took in any of the other cars. The only thing I can compare it to is hitting a concrete wall, compared to what it used to be."
8). Ty Gibbs Watkins Glen: "I felt like it was a pretty hard hit for as soft as it was. So hopefully we can figure out how to make these things softer and preserve the lives of the drivers. I feel like that's the most important thing. I feel like we're seeing it from everybody."
9). Denny Hamlin's comments after his August Daytona crash: "That was certainly the first real big one I've had in this car. Everything they've been telling us, all the other drivers, it's true. It's legit."
10). Alex Bowman called his crash at Texas "the hardest I've crashed anything in my entire life." He finished the race but concussion symptoms will keep him from racing at Talladega
there is more too