1.
Build what customers want, not what you want. Engineering-driven design without customer validation creates products that impress engineers but miss the market.
2.
Early hype creates expectations you must deliver. Promising $40K and 500 miles then delivering $80K and 320 miles destroys trust faster than recalls.
3.
Your brand's politics become your product's baggage. When 60% avoid your brand for political reasons, even great products can't overcome the association.