·Industrial Outdoor Storage (IOS), a twist on a classic property type, is attracting institutional capital.  With sub-3% vacancy and strong rent growth, Industrial Outdoor Storage (IOS) is outperforming traditional industrial assets.·     Zoning and entitlement hurdles limit new IOS development, boosting demand for existing sites.·     Major investors are amassing IOS portfolios, following the path of self-storage and single-family rental.·     IOS supports logistics, construction and utilities with strategic infill locations and flexible outdoor space.·     Electrification and evolving logistics technology are reshaping IOS.