I'm somewhat aware of the improvements, but at the same time I haven't seen much of that terseness in the real-world C# code I'm dealing with (typically Unity gameplay scripting code).
Unity is stuck on an ancient language version unfortunately and has seen none of the runtime improvements of vanilla .NET due to using custom mono fork and build process. Hopefully this will change with the release of Unity 6. With that said, even old C# can be written in a compact way. Most suffering is completely self-imposed and can even be observed proliferate in languages like Rust with such developers starting to adopt them.