I feel like there’s some kind of fundamental difference between things where we still use the object, but we use newer technology (portable digital devices, monitors, mice) and ones where the actual object itself isn’t in use anymore (physical audio storage & players and fax machines). I can’t quite articulate it, but I think this distinction is somehow important to this discussion.
For me, the one that comes most to mind are point-and-shoot cameras, both film and digital. There were simple cameras when I was a little kid, but for the most part, photography was something that was more of an enthusiast hobby when I was a kid.
Cut to the mid 1970s, and all the camera manufacturers started making point-and-shoot cameras with better and better functionality. Over time, they sold very well, and manufacturers even introduced multiple film formats for them (110, APS).
Then in the early 2000s, digital point and shoots took over from film, and sales shot into the stratosphere, with film essentially dying away. In the late 2000s, the smart phone was invented, and digital point and shoot sales died away faster and harder than film P&S sales had.
The Rise and Crash of the Camera Industry in One Chart | PetaPixel
Based on that graph, camera sales are where they were in the mid-1970s, and I’d bet that’s probably mostly mirrorless/DSLR sales, not point-and-shoot sales. Smartphones put the stake through the heart of non-enthusiast camera sales, then threw the squirming corpse out into the sunlight for good measure.
Now they’re effectively dead, with the exception of film wonks and people who want to be like various celebrities and influencers who use old P&S cameras of various sorts, as well as Gen-Z types who pine for some sort of past they never actually experienced and therefore futz around with film and old digital stuff in an attempt to disengage from the online world.