What do railroads, dot-coms, and AI have in common?

Raw JSON

{
  "kind": 1,
  "id": "000035d0bc7510c4290e09533eeeb18a722eb06f6a31ba31094a1a590da5e23f",
  "pubkey": "00000000827ffaa94bfea288c3dfce4422c794fbb96625b6b31e9049f729d700",
  "created_at": 1784153648,
  "tags": [
    [
      "client",
      "Wisp"
    ],
    [
      "nonce",
      "43473",
      "18"
    ]
  ],
  "content": "What do railroads, dot-coms, and AI have in common?",
  "sig": "5ce20163d6f8b9bd27a85d3d5d37433822efa97526d892c950b9c551e161788ff542b06e1e16c9fe466ce93b3dd43c6d5313de9fce5ee72bac6b7d97e9035f5d"
}