Until Chinese demand for Chilean a/o Bolivian lithium drives its price over $3x, at which point, having a local supply this big is a huge deal.
Practically, once prices become 3x of current, that's what everyone will pay on average, it just means (in this thought experiment) that some miner sourcing from America is marginally profitable, while some miner from South America is very profitable.
If this stuff is more expensive than Bolivian lithium, we won't do more than tinker with it until it's not, and consequently I wouldn't expect it to have much impact on the price curve — we'll all still be buying the same stuff until then.