> BYD ... is leading in battery tech.

Dang, it seemed not that long ago - 5 to 10 years - when Tesla had far superior battery tech. I know that isn't a short scale by tech standards but has BYD, and others, really leap-frogged that much?

I'm not in that space myself and do not keep up with EV benchmarks but am curious what advances or other changes were made. I recall reading Ford battery technology was also very good but interpreted that to be due to general advances in EV battery technology across the board rather than any one specific make/manufacturer.