So, what software can you make without relying on "std" library?

I think that a lot of complexity in Rust comes from many different ways to handle memory. You have your Arcs, Boxes, Cells, etc. Then you have a core "alloc" library.

Maybe if everyone agreed on a single reliable method to handle heap memory (since using stack is easy), Rust wouldn't be so hard to use.

The syntax also could be improved. Seeing <Box(T)> or whatever nested three or more levels deep hurts my eyes.