Well the author himself said that Redis evolved and there's now better PHP client. It thus means that it wasn't actually finished and was abandoned. In a close

Well the author himself said that Redis evolved and there's now better PHP client. It thus means that it wasn't actually finished and was abandoned. In a closed environment, sure it's just finished, but the world is much bigger, not closed at all. Even the good old Instalshield required maintenance from Microsoft over their 16 bits compatibility layer.