What is the advantage of this language compared to Go?

[ghost]

The language looks surprisingly like Go. If I rename the extension from .adept to .go, Geany could correctly parse and list the functions.

[IsaacShelton]

The primary differences are that Adept isn't garbage collected, has compile-time generics (Go's generics are implemented as interfaces), and has additional things such as operator overloading, more syntactic sugar such as unless, until, the ternary operator ? :, value management hooks such as __pass__, __defer__, __as__, records, typed enums, no namespacing, and a few other things.