IMVHO > How much lithium does the world have? We don’t really know for sure. That's the simple main point. The rest are speculation. Oh, sure "not being sure" is not a reason not to try, but is a reason to have some backups. SO far we lack them. And that's the main issue. The secondary issue is recycling of metals, so far we have many experimental procedures, more or less doable at a not-just-lab scale, but nothing u…
There are many battery recyclers in China that grind up lithium ion batteries all day every day and recover the metals.