I would hope that Lowell Goddard's enquiry into historic child abuse
I would bet a round of drinks that it will not be published until 2030 at the earliest.
She's already scheduled five years as a minimum. The Chilcot report is massively overdue thanks to Maxwellisation problems, and Goddard's enquiry will be far more complex than that. The Neville Report into the events that took place during one day, Sunday 30 January 1972, in one location, Belfast, with massive amounts of film and contemporary journalistic coverage of the events which only involved a handful of people anyway, started in 1998 and wasn't published until 2010.
Lowell Goddard is already 66, so will be approaching 80 by the time this process gets anywhere, by which time she will (not unreasonably) want to retire to her native New Zealand, if her health still permits. It will be forgotten about, no future government will be interested and, like Chilcot, it will be parked in the infinite "too hard, too toxic, too old" pile.
Politicians love enquiries that never report or take so long that they are all safely retired. They're Potemkin inquiries: they're deliberately set up with chairs who have every incentive to spin it out, given insufficient powers, have governance which ensures they are unstable and the reports are then long, boring and pointless.