I'd say this is probably a bad example of usage for the feature. I use pattern matching in a few places in my own code-base, and it's almost always on interface

I'd say this is probably a bad example of usage for the feature. I use pattern matching in a few places in my own code-base, and it's almost always on interfaces that have a large set of extension methods applied. It's kind of like an entity-component architecture, except the components are added at compile-time, rather than run-time. Unfortunately, real-life use scenarios are verbose and involved and require a lot of background context that detracts from just demonstrating the syntax. This is just demonstrating the syntax. Standard patterns of software design still apply.