Today, this version is largely obsolete. The official Steam and Rockstar Games Launcher versions of GTA V are many iterations ahead (v3000+), containing years of "Los Santos Drug Wars," "The Contract," and "Cayo Perico" content that Update 5 lacks.
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Occasionally, specific older versions are used to maintain compatibility with "legacy" mods that were never updated for newer versions of the RAGE engine. Today, this version is largely obsolete