Hi all,
I'm B747 (Classic) rated, with around 5,000 hours on the type, seen a few very high energy stops in my time, together with the occasional deflated tyre due hot brakes.
My reading of this post is such that I would have kept everybody onboard, "for the safety of the passengers and crewmembers".
because,
1/ there are always injuries when a B747 is evacuated,
2/ who needs crowds of grounded passengers wandering around the aircraft if the fire services have to extinguish a brake fire.
Safety is always paramount of course, but I think in this case, the best course of action, with the lack of any indication of anything amiss from the attending services, is to remain aboard.
(The firehouse at BKK is very close to 21L, and response is quick!)
The proximity of the fuel tanks is of no concern in regard to any decision to evacuate after an aborted takeoff, when the airplane remains on the hardstuff, it's designed to do this, for ....sake!
Cheers,
FD