The fact that they release 1.0 without doing this, I think says a lot. I personally haven't even started looking into Mojo because of the closed source stuff, but usually you can tell what's going on by looking for what's obviously missing.
LLVM has such a cool tutorial, eventhough I haven't written a programming language myself, it was excitung to go through it to see how static programming languages are lowered to SSA form.
Mojo should have something showing how to write a super fast matmul and especially what's interesting for me is a fast linear attention kernel, as that's where PyTorch is getting much harder to use.