Ditto for "type safety". This always feels like reaching for onnnne more feature on these project hype sites. "I don't expose the public API as Any!" feels about on the level of "has documentation"... which they also pitch as a feature.
This is true. If I'm choosing a package to use, and among the options, there's one with annotations and one without, I'll use the one with annotations unless there's a glaring feature missing. A recent example was moving from tenacity to backoff for retrying.