So, what are the advantages of using MS Office 2019 64-bit? Here are a few:

Most new computers are shipped with 64-bit processors and a 64-bit version of Windows. According to Microsoft, "Computers running 64-bit versions of Windows generally have more resources such as processing power and memory, than their 32-bit predecessors". The 64-bit Office 2019 is designed to take full advantage of this modern hardware, leading to smoother multitasking and faster processing speeds.

The 64-bit Office 2019 is the one you download directly from Microsoft’s own servers using their tools.

For many years, Microsoft recommended the 32-bit version of Office for most users to ensure compatibility with older add-ins and ActiveX controls. With the release of Office 2019, the 64-bit version became the default installation standard.

The official Microsoft servers will download the that you would find in a secret index—except this one is guaranteed clean, up-to-date, and legal.

Recognizing the shift in hardware, Microsoft has transitioned to making the 64-bit version the default installation for Office 2019 and ProPlus. As one Microsoft Community article notes, "Office ProPlus and Office 2019 now install 64-bit as default". This move signals that Microsoft has aligned its development resources with the capabilities of 64-bit architecture, ensuring that new features and security updates are optimized for this platform.

—which can cause crashes when handling massive files—the 64-bit version provides up to 128 TB of virtual address space

Excel power users benefit the most from the 64-bit upgrade. If you work with massive spreadsheets, the 64-bit version is mandatory.

Security architecture is inherently tighter in 64-bit computing ecosystems. Microsoft compiles the 64-bit version of Office 2019 with advanced hardware-based protections that are less effective or unavailable in 32-bit builds: