Pattern Matching was 5 years ago (and I use it all the time, it's great). I have to admit I've not come across many C# 9.0 features in the wild yet, and I might

Pattern Matching was 5 years ago (and I use it all the time, it's great). I have to admit I've not come across many C# 9.0 features in the wild yet, and I might double take if I saw them used liberally throughout a codebase. The null-coalescing assignment I'm a bit skeptical about the value of, or at least, it doesn't fit with my preferred style of coding (sticking to non-nullable types where possible, and generally avoiding variable reassignment).