40A is by no way "astronomical"
I discharge @ 30A and charge at 15A if anyone cares
30A = 215W so, like a 13.5?
The first generations of lithiums were a new frontier in batteries, maybe scared us into worrying too much of a fire, now I always charge in a lipo bag and won't walk away from a charging battery that i'm trying to get warm, but that's just basic responsibility, I have little belief that my batteries will actually burst into fire from what we're doing, especially if you're on the LiHV or whatever packs where we're only charging to 8.4 and they can supposedly take 8.6