What the podcasrs have done is collect, organise and examine various issues all in one place. Some people think the past should be forgotten but how can it? If current investigators find a solution it will need to explain not just who but how, why and when. It will have to fit with the evidence given by the witnesses at the time.
Mark Saunokonoko's podcasts deal with issues which were fully investigated by the Portuguese justice system of the time which saw fit to close the investigation into Madeleine's disappearance.
That effectively closed the door on it and only the unceasing, untiring and ultimately successful efforts made by her parents to have her case reopened and investigated has given any meaningful chance to have what happened to Madeleine any chance of being revealed.
Scotland Yard and the Judicial police both of whom had and have infinitely more resources than an amateur at their disposal ... have looked at the cold case files and dealt with them ... before going on to deal with the evidence missed and new evidence which has arisen since.
I find the innuendo and libel which sometimes arises as a result of amateur misunderstanding and failure to think of context very disturbing indeed ... but most of all it is the accompanying unpleasantness and unkindness ... of which I have discovered Mark Saunokonoko's twitter feed is rife ... which causes me to despair of my fellow human beings.