The trouble with builder pattern is that it basically introduces a new concept (the builder class and any class hierarchy of builders), purely for the sake of constructor functions.

The constructors that live in builder classes can just be separate module functions, attached to no class, and use decorators or other non-object-oriented types of metaprogramming to add specializations.

It’s very nice to encapsulate complex creation in a helper function, but builder pattern just takes this idea and adds unnecessary code bloat.