Plenty of companies have history especially with pioneer...

Plenty of companies have history especially with pioneer technology (never alone all the mining companies with disappointing drilling results)
What is now relevant to AEB is the appointment of two new directors and the Chair Mal James recently taking on an executive position. I understand he is spending some time in the US overseeing operations etc.
IMO its time to give AEB a second look/chance and there is no value in constantly dragging up the past.