The two big reasons for the disaster are of course the cladding but also the stay put policy. The moments the flames crawled up the building the fire was not isolated and the building should have been evacuated, it wasn't even possible to put out the top floor flames as the fire trucks ladders didn't even go that high so I don't know how anyone expected to put out the flames and bring it under control. It meant the only people in the high floors that lived are the ones that choose to ignore the safety advice and leave.
But there are so many other reasons like poor building maintenance/renovations in other areas which could have saved lives as well. I remember residents saying they couldn't even hear the fire alarm on the news.
I hope there are prosecutions and lot's of them as it wasn't just one reason it happened it was because of many failings and just because no one person/organisation is solely responsible doesn't make them innocent.
Yes I also hope that prosecutions will be brought to those that deserve them. I have worked in the building industry and buildings are now very complex structures, new materials are being used all of the time and mistakes happen, but where there is clear negligence I do hope justice is served and lessons learned.