This would imply you could make floor to chest height walls of sheetrock and studs even cheaper than cubes. I'm not seeing it.
There is a long term savings in that reorgs of cubes means a couple hours for a couple guys with screwdrivers instead of week or so of carpenters / electricians / painters.
Reorgs of cubes are a couple hours IF you are using exactly the same numbers of each component (unlikely), or IF you can get additional parts compatible with the cubes you have. Every place I've worked that tried to reconfigure their cubes found that it was much more expensive and time-consuming than they'd expected. In one case the vendor had either gone under, or discontinued that model of cube components (I forget which). My current employer seems to have a small stockpile of extra cube components, so maybe they'll avoid this pitfall, we'll see.
When I worked for FedEx there was a specified amount of space you would get based on your job title. So when the guy next to me was promoted to something that is like a technical fellow they expanded his cube 2 feet. This makes the next cube over unusable so they just stuck a cabinet in it. When a senior manager was promoted to VP they took down a wall and moved it out 2-3 feet and rebuilt it and put in all kinds of expensive furniture...
There is a long term savings in that reorgs of cubes means a couple hours for a couple guys with screwdrivers instead of week or so of carpenters / electricians / painters.