Office 2013 64-bit is not for everyone. It’s for the analyst with the 4GB pivot cache. It’s for the Access developer supporting a warehouse inventory system. It’s for the Windows 7 holdout who needs a modern-ish Office without the subscription tax.
The 64-bit version was specifically built for "power users" who exceeded the limits of the standard 32-bit edition: Choose between the 64-bit or 32-bit version of Office Office 2013 64 Bits
Office 2013 64-bit blew that door off its hinges. Office 2013 64-bit is not for everyone
To run the 64-bit edition of Office 2013, your hardware and software must meet these specific criteria: What's new in Office 2013 - Microsoft Support It’s for the Windows 7 holdout who needs
Office 2013 64-bit is a version of the Microsoft Office suite designed to utilize the power of 64-bit processors, primarily recommended for users handling (e.g., Excel files over 2 GB). Critical Support Note