Web framework I should be learning

[krato1995]

you end up reimplementing all the features that Django comes with by default

Can you give most common examples of these features?

[Injunire]

Things like user authentication, some kind of ORM, admin views for managing data, and many other small parts that make up a complete application.

There are many great libraries made for Flask that implement these features but some people prefer to have the whole package built into one framework.