Dependant on the age of the truck would spend on whether it had AEBS fitted. Our new ones have and I think it was made compulsory in 2016 from memory for new trucks.
AEBS will hopefully stop more bad accidents like this from happening but people can still turn the system off and there is always the fact it can malfunction and not work when it’s needed.
How many people would take a truck out knowing the AEBS system is not working rather than defect it and refuse to take it until it is fixed.