+\section{Conclusion}%
+Classy deep embedding is a novel organically grown embedding technique that alleviates deep embedding from the extensibility problem in most cases.
+
+By abstracting the semantics functions to type classes they become overloaded in the language constructs.
+Thus, making it possible to add new language constructs in a separate type.
+These extensions are brought together in a special extension constructor residing in the main data type.
+This extension case is overloaded by the language construct using a data type containing the class dictionary.
+As a result, orthogonal extension is possible for language constructs and semantics using only little syntactic overhead or type annotations.
+The basic technique only requires---well established through history and relatively standard---existential data types.
+However, if needed, the technique generalises to \glspl{GADT} as well, adding rank-2 types to the list of type system requirements as well.
+Finally, the abstract syntax tree remains observable which makes it suitable for intensional analyses, albeit using occasional dynamic typing for truly cross-extensional transformations.
+
+Defining reuseable expressions overloaded in semantics or using multiple semantics on a single expression requires some boilerplate still, getting around these issues remains future work.
+\Cref{sec:classy_reprise} shows how the boilerplate can be minimised using advanced type system extensions.
+