....last time I bothered to 'look', 16" transcription tables & discs are Still available to the Real die-hards....and there will always be some kid, somewhere, that will mess about with a 'radio' using a crystal and a wire....
I'm pretty sure that we can all go happily into 'dirt-nap' mode with the reassurance that all formats and all means of accessing them will prevail among some antiquarians that will keep some form of candle burning....
Just Because.... ;)