Absolutely. Elon tweeted an interesting response last night to an article trying to predict a possible tidbit for Batttery Day involving using iron as a battery component. Elon called out for miners to mine more nickel in the last earnings call and reiterates in his response that it all comes back to nickel:
No, but you make some great points. Important to note that iron’s cost advantage is partly offset by increased pack mass, so the fully considered cost is closer to nickel. That said, iron alleviates much of the scaling problem.