In over 20,000 miles of bulk charging with a 50Ah pack, I've seen at most .05 variance. I've swapped out 5 cells out of 120 cells total in the pack, and most of them were still plenty safe to use. The key is, have enough capacity you never run your cells anywhere close to the voltage they start to be at risk. The ones that tend to have fire issues seem to run BMS, or running way too low capacity for their needs, or their wiring practices are horrendous. I bulk charge normally twice a day. work is about 20 miles one way. I don't have to charge to do 40 miles, and do 60 miles on the weekends often on a single charge, but I still don't run down low enough I'm concerned. Run heavier, quality, wire than what your system requires. I used to own a car audio and security business, so wiring comes pretty natural to me, and had cars win trophies in IASCA events.
I'd rather have notice on a display where I can check all 120 cell voltage and battery life capacity percentages. Soon as that comes out I'll be in line to buy it.