You joke but music memory is literally the last thing to go. In fact, if you ever want to help the nurses care for your relative with dementia, make 2 playlists / mixtapes of their favorite songs. One Playlist of calming songs for them to sleep to and to listen to when they're upset, and one Playlist of exciting songs for when the physical therapist needs to get them up and active!
My wife still struggles with language and memory after her strokes from several years back, but every now and then she'll break into song with a perfect tune from even as far back as her childhood.
Better yet, get a qr code to your own domain that forwards to your spotify playlist so you can change the entire qr code to something else in the future should you want to
Who's going to maintain the domain while you're in coma? Also how do you know the price for playlists 5 years from now, it could be more expensive than a car!