In a documentary about and with James Natchway, one can see the photographer supervising a darkroom work of one of it's iconic images.
The point is that the prints are huge. And the guy in the lab (sorry I can't remember it's name) use trays that are not the size of the prints.
He has a tray which has for longest dimension the smallest of the print and looks like a tubing cut in two in the length. He constantly rolls and unroll the print in the developer, then in the stop and last in fix. This is to say that you can do very large prints by rolling them in the chemicals and not having huge trays to ruin yourself or eat all the darkroom space !