There was a metro / subway there but it never seemed to go where we wanted to go.
The light rail is actually a huge success story in LA right now.
Also it depends on which way you are going. The 405 north of Sunset is a disaster if you (in general) are going from West LA to the Valley after work but if you travel the opposite ways, traffic is generally fine...
Before: 100k / 12k ($1k/month) = 88k After: 150k / 48k ($4k/month) = 102k
Sure, you say to yourself that you ended up with an extra 14k, but then you need to still factor in the rest of your increased costs. And you should probably recalculate everything as an hourly equivalent since you'll likely add 2 or more hours to your daily commute in exchange for keeping that house cost bump at a mere 4x.
The numbers shift based on where you are and how much you make. The point is that a large number of people don't properly factor in all the actual and implicit cost and quality of life changes.