Power curves are one reason lead isn't more used (they spike a fair bit). The other one to look at is how the tech itself scales, almost all batteries all catch

Power curves are one reason lead isn't more used (they spike a fair bit). The other one to look at is how the tech itself scales, almost all batteries all catch fire easily due to the chemical processes. That becomes a bigger problem the more you pack them in and there has been more research in getting Lithium cells to not catch fire than lead acid lately.