i think its due to teh banana type plugs nat being able to handle teh current loads with these high rated batteries.
I have seen plenty batteries using corally/banana type plugs either melt the female plugs or unsolder themselves from the heat.
Havent seen it happen with a deans type battery.
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0