The phrase emerged from the emulation and backup-loading communities because this specific ISO version offers three major advantages over its successors:

: v10.1 is highly regarded for its dual support, making it easier for users with games from different regions to find functioning cheats without manual conversion.

if you are playing on original hardware and want a nostalgic, menu-driven experience with a huge built-in library. It is widely considered the most stable and feature-complete version of the software.

If you are looking for technical guides or the history of these modifications, the most reliable "articles" are actually community-maintained wikis and forum threads:

and its ability to function with modern homebrew like Open PS2 Loader (OPL) and the PCSX2 emulator. Why Codebreaker v10.1 is the "Better" ISO