The official way to download older versions is through the Creative Cloud app. Note that Adobe generally only provides the two most recent major versions How to do it
The "best" version of Illustrator is subjective, dependent on the user's specific hardware ecosystem and workflow requirements. For the majority of users, the Creative Cloud app’s "Other Versions" feature provides the safest and most reliable access to legacy builds. illustrator old version download best
Best Practice: If you cannot access the version you need via the official Creative Cloud app, and you do not own a physical copy with a valid serial key, downloading from a "warez" site is strongly advised against. The official way to download older versions is
If the version you need is not listed in Creative Cloud (typically versions older than the "N-1" major release), you must use alternative official methods: Option A (vector): Overlay a low-opacity noise/grain texture
Install: Choose the specific version you need from the list. Accessing Much Older Versions (Legacy)
Any website offering "Illustrator old version free download" is either malware or piracy. The risk of identity theft, ransomware, or being sued by Adobe (piracy fines start at $150,000 per title under US law) is not worth saving $21.