I think this ties in more with the decrease in quality of movie/music sound mixing. There are current movies coming to theaters with mixing so bad that they have to rerelease it with the proper audio (such as Across the Spiderverse). Many, MANY albums that release today have noticeable digital clipping because engineers have now assumed that high gain is always better etc. etc.
There used to be a reason to have a 5.1 surround system, because that's how the movies were supposed to be enjoyed. There used to be a reason to engineer your home "soundstage" because that's how the music was mixed and optimally appreciated.
I don't think the bar of entry being money is truly the reason, rather that people have become much more passive consumers of media, and the producers have recognized that and absolutely enshittified their products.
As for the cheap speakers = cinematic experience, watch Interstellar with 5.1, then with the soundbar and tell me how equal the experience is.
There used to be a reason to have a 5.1 surround system, because that's how the movies were supposed to be enjoyed. There used to be a reason to engineer your home "soundstage" because that's how the music was mixed and optimally appreciated.
I don't think the bar of entry being money is truly the reason, rather that people have become much more passive consumers of media, and the producers have recognized that and absolutely enshittified their products.
As for the cheap speakers = cinematic experience, watch Interstellar with 5.1, then with the soundbar and tell me how equal the experience is.