Lilium

Lilium, the German start-up for electric air cabs, failed due to several factors. The technology was ambitious, but complex and expensive to implement. Problems during development led to delays and rising costs. There was also a lack of clear demand, as the infrastructure for air cabs barely existed and regulatory hurdles were high. Investors lost confidence as Lilium was unable to deliver a market-ready jet despite investing billions. Competition from more efficient mobility solutions such as electric cars and high-speed trains also made it difficult to develop a viable business model. $LILM