BYD are literally handmade. I expect QA issues worse that Tesla’s Production Hell and in long term support. Plus, they’re doped up with subsidies like an Eastern Block Olympic Athlete; China needs to prop up its books after the Real Estate bubble turned to rubble
They seem to have significant quality issues - I have multiple friends with them in Thailand, and every second social post from them is bitching about whatever randomly stopped working or fell off this time - although I have a feeling they build their Thai market models elsewhere.