alt Hacker NewsIt depends on the rationale. If the intent is self-reliance in the event of a trade war (or worse) with China, then even a year's buffer isn't enough to bootstrap home manufacturing from scratch.
It needs to be in-service and available before any serious conflict.
Maybe, combined with a buffer, there need to be plans in place to get a factory up and running in six months? Or it could be running at a low level with plans to scale in six months.