✅ No install, no admin rights. ✅ No background services: Unlike DC, which runs Adobe Genuine Monitor and update services. ✅ Silent operation: No pop-ups asking you to "Start free trial." ✅ Works on USB 2.0/3.0 drives: Lightweight enough. ✅ Multiple instances: You can run different versions of Acrobat simultaneously (e.g., DC installed, XI as portable).