Short answers, pulled from the story.
Street Fighter II Turbo arrived in arcades in 1992 as a lightning-fast upgrade that fundamentally changed how players interacted with the genre. This release date marked the beginning of a new era for fighting games by introducing faster playing speeds that demanded precision timing and quicker reactions from every participant.
Every fighter in the roster received at least one new special move, transforming the tactical depth of the game and giving veterans fresh ways to dominate the screen. Ryu and Ken gained the ability to perform their Hurricane Kick while airborne, while Chun-Li possessed the Kikoken projectile technique and the ability to execute her Spinning Bird Kick in the air.
The Super Nintendo Entertainment System version of Street Fighter II Turbo was released in July 1993 in Japan and August 1993 in North America. This port utilized a larger 20-megabit ROM cartridge to accommodate the Turbo rules and the Champion Edition rules as an alternative mode.
In 1997, Electronic Gaming Monthly named Street Fighter II Turbo the best arcade game of all time. They also listed the Super NES conversion as the fifth best console game of all time, explaining that it was the last and best refinement of Street Fighter II before the basic formula of the series changed with the Super and Alpha installments.
Nintendo re-released Street Fighter II Turbo in September 2017 as part of the company's Super NES Classic Edition. This re-release ensured that the game remained accessible to new audiences, preserving its legacy and allowing players to experience the game's unique features and historical significance.