Work: It boots, it runs programs, it displays, it interacts.
Maintained: There is always someone taking care of each package.
Bugs: We are lacking of developers.
Security: We are lacking of developers.
Hardware Compatibility: Devices in developers' hands are more likely to work.
Integrity: You need to get rolled with your system.
Backward Compatibility: Deprecation means death.
Cross-distro Compatibility: We just don't care.
User Friendliness: Developers are users. Users need to be developers.
<pkgname requires deprecated/unavailable package>Use flatpak.