Is it really just a 5x reduction in power cost that would allow "cheap" desalination? Would it require a 50x reduction in cost? I wonder if cheap desalination a

Is it really just a 5x reduction in power cost that would allow "cheap" desalination? Would it require a 50x reduction in cost? I wonder if cheap desalination and cheap desalination are on the same order of magnitude. Do you know the current cost of desalination? Is there any sort of accurate estimate of how cheap power would be? (I guess not since everything is a prototype and nothing has been able to produce excess power from fuel).