> Are the majority actually writing code like this though? Yes. For example, some use cases: https://www.typescriptlang.org/v2/docs/handbook/unions-and-inters

> Are the majority actually writing code like this though? Yes. For example, some use cases: https://www.typescriptlang.org/v2/docs/handbook/unions-and-intersections.html https://www.typescriptlang.org/v2/docs/handbook/unions-and-i... This sort of code is very common. I really don't know what more to say about this; if you don't want to use them, don't. ...but if your excuse for not using them is that other people don't, it's wrong.