Ask HN: Using pre-1.0 software in production. How do you decide?

How do you decide to use a pre-1.0 (open-source) programming language or package/library for production apps?

Example scenarios:

- Using a pre-1.0 programming language

- Using a pre-1.0 library or package

- Looking at the popularity (downloads) of a pre-1.0 package to influence whether to use.

Are you using a pre-1.0 language or library in production (or building a product)? Or do you consider it too risky for production use?