Fair enough. My point is that it's still an untested technology. Tesla drivers are reporting stuff like as much as 10% less range due to these batteries
It's old, pretty well tested technology with a much better lifespan and lower deterioration in capacity over time than normal lithium ion - it was just a little niche until recently because it had lower energy density than more common lithium ion technologies and was more expensive than lead acid. Mostly got used in electric buses and stationary (or sometimes boat) applications before, I think.