I think there's a lot of factors that shortens their lifespan in the wild where they're abundant. Suitable shells is a big one. I've seen videos where as soon as one swaps shells, it starts a chain reaction of shell changing down the line. That's a major expense when they get big. The size shell that Johnathan is in, in that video is a $30-40 shell easy and you need 3-5 extra suitable ones in the enclosure per crab to keep them healthy. Shells get super expensive in the larger sizes. They have to be turbo snail shells, round opening, smooth texture. It's so funny to watch them inspect and measure out a new shell.