Some searching suggests it’s not that far from 50:50 in terms of actual rides. Uber drivers average well under 20 hours per week. Taxi have significantly fewer drivers working much longer hours, but they dominate very short trips.

Makes sense to me. There is a lot of existing infrastructure anticipating cab companies. Airports, stadiums, hotels, resorts, etc. all with dedicated cab lines that can get you seated in a vehicle in seconds.