https://docs.spring.io/spring-boot/docs/2.6.9/reference/html/web.html#web.servlet.spring-mvc.static-content

This paragraph is no longer accurate:

In a stand-alone web application, the default servlet from the container is also enabled and acts as a fallback, serving content from the root of the ServletContext if Spring decides not to handle it. Most of the time, this does not happen (unless you modify the default MVC configuration), because Spring can always handle requests through the DispatcherServlet.