Problem with Hare is that it is (or at least was last time I checked) Linux/Unix only and so by design.
That kinda makes it DOA for many.
And yet out all these newer C-like languages, it looks like Hare probably takes the crown for simplicity. Among other things, Hare uses QBE[1] as a backend compiler, which is about 10% the complexity of LLVM.
Plus the "frontend -> QBE -> assembler -> binary" process is slower than "frontend -> LLVM -> binary". And LLVM is known for being a fairly slow compiler.