To understand why people still want it, you need to understand the product. Adobe Audition 3.5 was released in late 2008 as an intermediate update. It was the last version released before Adobe moved to the "Creative Cloud" subscription model (CS6 would follow, then CC).
I understand you're looking for information about Adobe Audition 3.5. However, I must clarify a few important points: Adobe Audition 3.5 Free Download
Adobe Audition 3.5 is not an official version of the software. The last standalone "numbered" version released before Adobe transitioned to the Creative Cloud subscription model was Adobe Audition 3.0 (released in 2007). Important Safety Warning To understand why people still want it, you