In Seattle, traditional cabs are 50% cheaper than Ubers to go from Seatac to the city.
What most people like about Lyft or Uber: known price, known route, and backup drivers automatically located if there's an issue with the first driver.
That peace of mind seems worth paying for.
I was gleeful when Uber and Lyft came on the scene to have an alternative to cab BS, but the one place they still shine is when going from an airport into a major metro area.
I have taken a cab ones, but to Fauntleroy, and I was missing a ferry (which I missed anyway because the driver took a weird way). However, the transit options to West Seattle aren’t nearly as good as to downtown though.
I'll give an exception to certain cities that have superb transit options, but none of those cities are in the US.