I'm not sure that's an accurate description of the black hole issues. I don't think we were ever able to ascertain the exact reasons the cars that wound up in the black hole wound up there.
We do know that there is and was a shortage of the Next Generation seats, but I don't think it's ever been categorically proven it was an airbag issue. There have been rumors about safety issues, and that Tesla wanted them to be safer, and there have also been things said about the port issues. But I don't think we know anything definitively.
As for the black hole cars, I'm pretty sure the consensus is that their issues were more than just seat issues.
Certainly that is my feeling. I think the initial emails from Jerome made note of seat issues but as time went on (and on) we got other emails about how slow it is to replace parts manually etc.