You will have no issue getting either a taxi or a rideshare.
Taxis will be waiting at the terminal. Rideshare cars (most of the time) have to drive to you from the holding lot. If the airport is busy enough, they will be dispatched to you immediately after dropping someone off at Departures.
Either way, you are charged for distance plus time.
With a private car service, you are charged a flat rate. The driver will meet you at baggage claim and escort you right down to the car, which will be parked in the Ground Transportation Concourse on level 1. It’s a pretty seamless process.