The improved "R2" version is 64-bit only, meaning 32-bit users cannot upgrade to the newer kernel or features like Active Directory Recycle Bin.
Drafting a review of requires looking at it through a historical lens, as it represents the end of an era for 32-bit server architecture from Microsoft. Windows Server 2008 32-bit: The Final Frontier for x86 2008 Server 32 Bit
Its minimum requirements— 1 GHz CPU and 512 MB of RAM —made it highly accessible for small-scale operations or virtual labs. The improved "R2" version is 64-bit only, meaning