Being go minded is to avoid complications high speed reject due to improper execution or brakes conditions, false fire warning etc but a shade beyond 80kts long way to V1 so reject is safer option. A330 unreliable speed incident the speed check in A330 is at 100kts which is where high speed regime also starts so they continued got airborne and made a meal of the procedure. They were better of rejecting a shade beyond 100kts which much less complicated then UAS procedure.