One of the most common reasons users today look back fondly on is the User Interface (UI).
: Using version 11.0.01 today is considered a high security risk, as it contains unpatched vulnerabilities that can be exploited by malicious files. adobe reader xi -11.0.01-
If you are currently stuck with for a specific workflow, you have several upgrade paths that do not require moving to Adobe Reader DC (which is now ad-ridden and telemetry-heavy). One of the most common reasons users today
Before version XI, the free Reader was largely a "read-only" experience. You could view, print, and perhaps fill out forms, but editing was reserved for the paid Adobe Acrobat Pro. Before version XI, the free Reader was largely
Many government smart card PKI environments (common in parts of Europe and Southeast Asia) issued digital signing certificates that were only validated by Adobe Reader’s cert store as it existed in version 11.0.01. Newer Readers reject these older certificate chains. Users keep 11.0.01 on a standalone offline laptop solely to decrypt old signed PDF invoices.
: The flaws were tracked as CVE-2013-0640 and CVE-2013-0641 .