Lithium is not that limited, current reserves are based on current exploration. More sources will be found and exploited as demand grows.

And if you want an alternative, sodium batteries are already coming online.

There are over 200 billion tonnes of lithium in seawater, it's just the least economical out of all sources of this element.

There are plenty more, but they're explored only when there's a price hike.

We have 10 years of 2021 global energy production (including oil/coal/gas!) of LFP in the oceans; but yes, sodium batteries are probably cheaper.