5E doesn't have prestige classes. In general, it does not have the mix and match multiclassing insanity that, for better or for worse, pretty much defines 3E/3.5. Making the base classes powerful, customizable, and interesting at every level was a 5E design goal and I think one which succeeds — multiclassing is available, but it's mostly a straight trade of high-level power for greater flexibility, rather than a must-have to build an interesting character.
Instead, each class has subtypes with interesting and different mechanics and game play. In early access, not many of these are implemented — but I'm sure we'll see more.
Last edited by Postwave; 13/10/20 12:21 PM.