While I suppose breakpoints might still have some use cases, I believe an overwhelming amount of the stuff we currently use them for can be better and more flui

While I suppose breakpoints might still have some use cases, I believe an overwhelming amount of the stuff we currently use them for can be better and more fluidly accomplished with container queries. The example you give of a sidebar collapse with a menu button replacement can easily be accomplished with a container query on the wrapping box, no? I'm honestly curious about a use case that a media query breakpoint can handle, but which a container query can't.