Not all businesses need to grow to huge heights to not be considered successful. It's a shame they can't continue to operate in the areas that it works well in (such as here in SF). Scoot have had a hard time growing, but are as successful as ever in SF, so that should be seen as a success in itself. We now have very lofty expectations for businesses either Blitzscaling [1] or dying, but surely it doesn't need to be that binary.
Clearly private solutions to commuting need to exist, people are not satisfied with the public transit in most cities. In a capitalist country, the markets will reward those who succeed. Lyft/Uber are helping somewhat, but you can point to as many articles [2] showing how over congested cities become because of them (even with pooling), which take up much more road space than buses. Let's hope someone else gives this another shot, and we don't shoot them down if they don't become a unicorn.
[1] https://www.amazon.com/Blitzscaling-Lightning-Fast-Building-... [2] https://www.chicagotribune.com/bluesky/technology/ct-uber-ly...
The book Netflixed (mentioned in the article) is likely also a good source: https://www.amazon.com/Netflixed-Epic-Battle-Americas-Eyebal...