Real experience:. I made about 90k over 1.5 years of driving for Uber/Lyft. Much maintenance I did myself, and took my car (Honda insight, 30mpg city/45 highway) from 70k to about 260k. Obviously this paid for itself (~16k) and rent in the expensive bay area, and some.

I don't know if it's as lucrative as it used to be, and I was also very very good at it. Usually ~50-75% of my fares were not at base rate.