Before this version (the CS9 era), designing for the web was a game of "Save for Web," upload, check the browser, fix the PSD, and repeat. It was a disjointed, clunky process.
If such a powerful version exists, why force artists into monthly CC payments? Adobe’s official stance is that "there is no CS9; the Creative Suite legacy ended with CS6." However, former employees (speaking anonymously on Reddit) suggest three reasons: adobe photoshop cs9 exclusive