To be fair, they were all valid points to make. The gonorrhea thing just kind of set the tone wrong.

Unless all batteries are installed at once and will fail after a fixed duration it won't be a big issue. After 10-20 year 2-5% batteries will fail and will have to be replaced, along with any new capacity addition. We can emphasise on diversifying the supply chain or having multiple technologies so that a Covid like scenario doesn't completely conks the system, but it isn't much different from any other system we use. And in case of battery, we actually get a real-time info about its health and so can easily calculate capacity of the system. Batteries go from 90% to 0% in extremely rare case.