This is, in part, what helped lead to some of the safety standards we have today: https://en.wikipedia.org/wiki/Carrollton_bus_collision
It is one reason gas powered (large) buses are mostly extinct, crash cages around fuel tanks, wider aisles, roof escape hatches, and escape side windows.
It is worth noting that the bus in the article was built just 9 days before some of the important safety standards went into effect ... it lacked some of the standards that went into effect. Escape windows might have prevented some of the deaths.
The Wiki claims it and the video demonstrates it. Fully engulfed in under 4 minutes. Airlines do evacuation drills (usually for the crew) regularly. I remember doing the same as a kid in school (even though I didn't ride the bus). I believe airlines are supposed to be able to completely evacuate the aircraft in under 90 seconds (and that's using the slides). Fire extinguishers and parachutes are a lot alike - when you need one, nothing else will really do the job, and you need it *RIGHT NOW*. But more to the point, it's job is not (always) to put out a big fire - but to buy you enough time to make a safe escape.