Sorry for your loss.
If you can determine what happened, it would probably save some other cars from the same fate.
I've never been fond of upping fuel pressure on a system that was built for 50-60 psi from the factory to 120 with no changes.
Regarding extinguishers, I'll start offering a dry chemical version of the Halon one we offer with seat bracket. That'll get the cost down and get the extinguishers in more cars. Halon has become quite expensive
It wouldn't have helped once the fire got too big, but may have if it was caught early enough.
A local red SRT-10 burned last week. Seems to be becoming a trend.
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