This long paper on cost estimation reveals the enormous complexity of just one operation. In July, 1996 -- late!!! -- the Department of Defense hired the Mitre organization to estimate the cost. See just how big a job it was to estimate the cost, let alone make the repairs.
Now multiply this across hundreds of equally large defense projects.
Then consider the repair of all Western nations' computerized military systems.
Then ask: Who will be the 800-pound gorilla on Jan. 1, 2000?
I keep getting the same answer: Red China.
On the allocation of assets to complete a y2k repair project, see the
California White Paper.