I think there are similar related downsides that could be said about ride-sharing too. If we are giving anecdotal experience then I will say that ride-sharing drivers in Chicago are much more likely to blow through yellow/red lights or park in a cross-walk. The reason is not hard to ascertain: I can easily call 311 on a taxi as a pedestrian with the taxi number.
Personally, I see a lot of people happy killing all of the problems with taxis (particularly in Chicago) but I fear that we are "throwing the baby out with the bathwater". Taxis in Chicago have a ton of problems, but I still have concerns about ride-sharing too.