There is no such thing as "end game" for speakers. There are just way too many designs with all kinds of sound signatures at various pricepoints...all with their strengths and weaknesses at any pricepoint. There are a whole bunch of models released every year....i.e. no end game.
However, there is such a thing as the end of a dude's wallet. When a dude's wallet ends ("end game"!), he tries to convince himself psychologically that he's got his "end game" speaker, etc... Yeah,..yeah...we know all about that schpeel dude...🤣