2⁶⁴ bytes is 16 exabytes . That’s enough to address every byte of data stored by all humans today, many times over. We will not exhaust 64-bit addressing in our lifetimes.
Searching for in the wild often leads to obscure GitHub repositories, abandoned SourceForge projects, or threads from the early 2000s on sites like EmuTalk or OCAU (Overclockers Australia). These communities use the term to describe: 128bitbay
These are not general-purpose registers for memory addressing. They hold multiple values (e.g., 4×32-bit floats) processed in parallel. 2⁶⁴ bytes is 16 exabytes
