Open sourcing code allows a new vector for finding vulnerabilities. Just because the software reaches its EOL doesn't mean it is removed from every computer.

Open sourcing code allows a new vector for finding vulnerabilities. Just because the software reaches its EOL doesn't mean it is removed from every computer. I believe that open sourcing Flash should be done for the sake of software preservation. But I would recommend 2025 (end of life for Windows 10 and IE11) as the earliest release date.