Expanding PL horizons is not a goal for this project. The goal for this specific usercode layer(of which there are four: WASM bytecode, the I/O memory map, the

Expanding PL horizons is not a goal for this project. The goal for this specific usercode layer(of which there are four: WASM bytecode, the I/O memory map, the lower level operating system language, and the higher level interpreted language) is to achieve a mix of sustainability and familiarity. A language defined by a book explaining its implementation, while also being in the "looks-like-an-Algol" ballpark, falls very close to that mark. If you want a Lisp, it's possible, just rewrite the OS layer.