* lots of new york license plates driving around in the last 5 years, indicating transplants. midwest/upper midwest states also.
* dining and entertainment has taken a major step forward in the past decade. it was never bad, but now it's really good in general. also, ethnic food has always been top notch but is now far more mainstream. food / culture enclaves exist but are frequented by the public at large, i.e. more integration. i see this in other large cities like new york and chicago also.
* public transit has improved in a major way. expo line (light rail from downtown to the beach) is opening next year and will have a major effect. uber also has amazing coverage everywhere, not surprising for a city full of cars.
* the bus system (and local subsystems) is probably the best in the country by a huge margin and is relied upon by probably millions of lower income people. it's very, very good and covers a massive area. it's probably the best bus system in the world, again not surprising for a driving city.
* commercial development was uncorked in the past few years and new construction is happening all over the city.
* the key is to live close to work, or to shift your hours. without traffic LA is extremely fast to get around whether in a car or public transit. it's the traffic that kills everything. lots of car enhtusiasts live in the city and drive around town or in the canyons early in the morning or late at night.
* traffic still sucks but there are many infrastructure projects to improve it. having said all that, people are still buying cars like mad. if you're into cars, it's like a car show every day. not just expensive, but rare, old, and unique custom-built cars too.
* anecdotally, when people leave LA, it's almost always for cheaper places i.e. portland, vegas, denver, etc. they only move to new york or other east coast cities when a lucrative or strategic job offer beckons.
* and last but not least.... downtown LA is now a legitimate downtown. it took 10 years of concerted effort by the powers-that-be, but it's a cultural destination and nice place to live now. a residential construction boom (you could buy a condo for < 100k at one point in the last decade!!!) has fueled a rise in shops, cafes, restaurants, bars, etc. in the downtown area. downtown is also the regional transit hub.