Reasons not to use Rust

- You think programming languages should be closed and proprietary
- You like random pauses caused by forced collection of the garbage
- You think program start-up should take minutes so you use stupid VM-languages instead
- You like broken features and memory corruption
- You sell hardware and want to deploy inefficient scripting languages only to sell more
- You only do pure programs that don't interact with the world
- You are a retard who doesn't understand the concept of ownership

Anything else?

There are a number of details that are important here. The first is that it's indented with four spaces, not tabs.

From: http://doc.rust-lang.org/1.0.0-beta/book/hello-world.html

Wait, does this mean Rust has FIOC?
Why does it matter if tabs are used instead of spaces?
And what kind of animal indents with spaces?