> there are so few 32-bit systems today Some of the most widely used MCUs for embedded Rust are 32-bit. But typically you want to be explicit about your sizes

> there are so few 32-bit systems today Some of the most widely used MCUs for embedded Rust are 32-bit. But typically you want to be explicit about your sizes when doing embedded anyways. I think using usize is mostly a convenience that lets you fit values into standard library functions.