I recently spent a weekend in a major city without Uber/Lyft. Trying to call a cab company was terrible, relative to the user experience of Uber or Lyft.
After making my request, a few cab companies simply answered "Ok" before hanging up. I called them back to get an ETA, and their dispatchers would give me answers like "30 to 40 minutes" or "I don't know".
I wasn't out in the boonies or anything. I was downtown.