Is It Better to Learn a Standard or to Write Your Own?

Is it better to learn sort of an accepted standard out there Versus writing your own that is no standard and and having to support your own right like it's a big question? I'm not saying that you never roll your own right But i'm also saying that you have to be realistic with how much time you plan on spending in any particular thing. There was a book where the author explicitly called out that when it comes time to do an upgrade of an environment if it's if the code is declarative then it's really configuration.