20 Modern Systems Still Running on Old Tech

The Internet ran short of addresses years ago, yet the older addressing system somehow refused to leave. IPv4 was standardized in 1981 with roughly 4.3 billion possible addresses, a number that once seemed generous and later became painfully small once personal computers, smartphones, servers, cameras, televisions, and countless connected devices came online. IPv6 was created with an enormously larger address space, but migration has taken decades because every network, application, piece of equipment, and service has to cooperate. The result is a worldwide patchwork.