It's kind of sad to me that (almost) complete type inference has been around since the [70s](https://en.wikipedia.org/wiki/Hindley–Milner_type_system) and it's still not mainstream. (unless you consider F# or OCaml mainstream languages)
For me, monetizing a hobby is a quick way to start hating it. Unless you really want as much money as you can get, you probably shouldn't monetize all of your hobbies.