Lyft's driver shortage is calling into question the sustainability of the passenger ride-sharing business model. None of the companies have ever shown consistent earnings, but instead posted staggering losses compared to most other publicly traded companies. If you read the Lyft reviews on this page https://lyft.pissedconsumer.com/review.html you'll see that Lyft lost $ 1.75 billion last year and $ 2.60 billion in 2020, even though it was profitable for the first time last quarter. It's a pity.