One shift I've noticed in AJLT is that Miranda now takes the subway to and from school. This lifestyle change hasn't quite made its way to Carrie and Charlotte, which isn't surprising. Miranda, while still well-off and prone to enjoy fancy brunches, seems to care less about extravagance, which we see conveyed even through the way that she decorates her home.
It's still Carrie's signature thing to effortlessly hail down a cab, but years have passed so she may also have expanded her modes of transport to Uber (or Lyft or another fictional ride service company).
After Che's comedy show in Episode 3 ("When in Rome..."), we see Carrie tracking her ride from her phone, saying, "It says Hector is approaching," followed by "Hector, you really brought it; I did not order this big car," upon her driver's arrival.
It's unlikely that there was a drastic price difference between Ubers and taxis, considering surged prices after a show in the city, but it looks like Carrie is, at the least, evolving with the times.