@weapon-man, just warm it :) and it will expand.
@SlenderHunter, there is no a why, just a way to improve and expand limits.
@jman31415 maybe there is a reactor in the save?
compressor compressor compressor, why not just make an expander?
These are useful if, say you made a reactor that runs on condensed DEUT. That way you could use CLNE or some other method of making the DEUT production infinite, instead of just having a big tank of it.
*here comes a discussion*
because it can be fun to do things differently
the console is very efficient. who wouldn't want to use it?
some people don't like using the console
why does everyone still need these though? the console with !set life deut (something exaggerated) is much more efficient and easy to use.