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?

>>21
Most popular programming languages have no such specification. The few that do did not have them from the outset. Standardization is most effective at codifying existing practice, not at trying to anticipate it.