Elate/intent was way, way bigger. It was a proper filesystem, with device drivers (object-oriented and named and mounted in the VFS), and modules and components and a package manager (which was actually pretty awesome) and Posix and a huge standard library. Even the translator was big, by which I mean double-digit kilobytes of translated code.
I would say it's not worth cloning. State of the art in JITs has moved on so much that intent's fairly crude binary translation's not worth much. Instead I'd use something like LuaJIT as a JIT core, and build up from there; it's fast, tiny by modern standards (although still way bigger than the intent core), and you get binary portability by pushing Lua bytecode around instead. Compiling C into FFI-heavy LuaJIT shouldn't be too terrible and should give decent performance, while keeping portability.
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Incidentally, despite my previous message, it may be possible that Amiga Anywhere still has an intent license. Which means they might have source code (because it's not like they're going to get builds from Tao any more). Does anyone know if Amiga Anywhere is still a thing?