UTG 727 destruction

I’ve heard and read for years about how durable the Mopar transmissions are but I also see stuff like this.
How come I don’t hear about dudes that barf the transmission in their Chevelle or Fairlane?
What is mechanically different that leads to this?
I did burnouts all the time in several Mopars with and without Sure Grip diffs. I never had one fail from that. I’ve had them lose reverse or third gear, I’ve had them just give up and fail completely but never break anything like this.