From a preservationist standpoint, this archive served a critical function. The original SIRIUS arcade cabinets are rare, expensive, and degrade over time. Konami has never officially re-released the SIRIUS songlist on modern platforms like IIDX INFINITAS (which operates on a subscription model with rotating catalogs). For a player in 2021, the only way to experience the precise note patterns of “Time to Air” or the infamous scratch-heavy “Almagest” was through a BMS simulation. The "rar" file, therefore, acted as a time capsule. It was the digital equivalent of a bootleg concert recording—illegal, yet often tolerated by rights holders because it targeted a hardcore, non-commercial audience that would otherwise have no legal avenue to access the content.
This version of the game introduced two major gameplay mechanics: Charge Notes (hold notes) and Backspin Scratches . Community BMS packs from 2021 often focus on accurately replicating these features within modern simulators.
