Home theater and even a good music setup is not a priority to the average person anymore. Yet they aren't going to the theater as much either, so streaming and digital audio on their phone was enough to sway those average people from spending money, despite these formats being more or less inferior. The cost of everything is up and big box places where those average people were getting gear don't sell GOOD gear, in general. It puts the work on the user to seek out quality gear, if they are even interested, so some just don't feel the need to put the effort in. If people aren't buying gear, or are buying gear online, the stores can't survive.