Apparently this is the full text...
This chart offers a reminder of how dependent the U.S. economy's growth is on the data-center buildout. Rising borrowing costs threaten those investments.
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I believe that they will be similar to other industrial building in that it will be concrete and steel frame/structure mostly. That is what you do, because you don't care about the internal finishing to make it look nice and you want to have sturdy anchor points everywhere for HVAC, conduits, and plumbing along with any more specialized installations. Think modern factories rather than modern mcmansions.