CORRECTION: Interpreter + AOT Compiler + Huge list of available functions + Parse Dialect + View Engine (GUI) + etc... All in <1 MB.

Not to say anything bad about Rebol, but .. K2 had a superfast interpreter, superfast and supereffective reactive GUI (with a milspec kind of look), and a superfast ha transactional database engine for about 400K static exe.

Alas, they dropped the GUI when K3 came out; the most recent available version K4 is ~400K without GUI, and the next version KPARC is a complete OS (boots on metal) with GUI, file system, database and everything at less than 1MB

The syntax is intuitive to some people, especially those named Arthur Whitney or using the nickname geocar (but I also find it intuitive); most others tend to disagree about how intuitive it is.