well that's an implementation of matmul as three nested for-loops and making it fast. so it's exactly "writing for-loops in Python and you want them to be fast." it's not a other thing.

fair point how about this https://docs.modular.com/mojo/programming-manual.html

you just posted the entire mojo programming manual

I did, to highlight the fact that it does more than you observed.

I mean I didn't say that mojo only has for-loops. I said that speeding up for-loops is the only reason to use it.