Braking at that speed will build up enough heat to blow a tire. It is absolutely a pants shitting moment and any cyclist riding a Time RXR with bike handling like that guy will know that. TL:DR Braking on long descents can/will fucking end you on a roadbike (unless using disc brakes...)

You’ve pretty much nailed what comments actions are for - so two people can argue and feel they’re more right than the one another. It's very much like how I'm right and you're not.