I think of it a little differently. I'm excited. I love these incremental type systems. I don't want to write C# all the time at all, but I do find myself missing it occasionally. These systems are excellent for easing that pain when a language like C# isn't an option.

When a statically typed, compiled language is an option I tend to choose Rust lately just for novelty and curiosity, but it's rare that I have those options. When I don't, I find these tools are a godsend. You don't really lose flexibility at all.