For my area in Los Angeles, it wasn't viable because everyone (or someone you know) has a car. a friend ride is much cheaper than an Uber.

I only download the Uber app when I need to get to the airport and am leaving for weeks at a time. Any other time, I take myself, ask a friend, or even consider what remnants we have of public transportation (e.g. instead of taking a horribly expensive uber in/out of LAX, take a shuttle to some smaller area and then hitch a ride. can easily save 4x the cost for a $5 bus ride and maybe 30-45 extra minutes)