In Debian 'unstable' means that the package versions installed aren't stable. That is, there is a high level of package churn just like any rolling release. It

In Debian 'unstable' means that the package versions installed aren't stable. That is, there is a high level of package churn just like any rolling release. It isn't any more buggy/crash prone than any other rolling release. There is just a risk at running bleeding edge vs. vetted/known working software.