Seemed like there was a lot of warning. The performance dropped off before there was danger of exploding. I didn’t watch it all, so maybe there were examples of random explosions. So user error.
And it was at Bristol so not a massive safety concern. There are certainly more dangerous things that NASCAR does that should be looked at first. Like letting Logano race.
If this was normal every race it would be tedious, but every now and again it adds value nd we get to see an important race team and driver skill.
If it was random explosions on super speedways I would have a different view.