Have you been to Los Angeles in the past few years? The city has made great strides in improving public transport. Last year's completion of the Expo Line "subway to the sea" was the last component needed to make a truly useful system.
The subway system - already the second largest in America by mileage - is finally getting big enough to be genuinely useful. Downtown LA has seen an incredible urban renaissance. All neighborhoods with subway service are rapidly urbanizing.
Imho there are two factors making this work so well for LA. First, the traffic is line some sort of biblical plague. Surface transport is ridiculously broken. At rush hour cars often move little faster than pedestrians.
Second is Uber/Lyft. They handle that critical last mile of many journeys. Remember, during busy hours, a subway trip can take less than 1/3 the time of a car trip. So the small inconvenience of hailing an Uber to go the last mile is a great trade off.
If I eventually repatriate, I'll most likely live in LA. :)