Old devices failed, new devices "just work" with IPv6, corporate environments are slow to change, until they're forced to. The "internet companies" have moved o

Old devices failed, new devices "just work" with IPv6, corporate environments are slow to change, until they're forced to. The "internet companies" have moved on to IPv6, but the "non-internet companies" are still stuck on ipv4 only (so google and cnn work, but your local steelworks is stuck on ipv4)