You can go slightly more high tech and just plug a USB drive into the port. Still no bluetooth or smartphone but you get more than 700 odd megabytes of mp3s.
I've taken it a step further and now just leave a Samsung external SSD plugged in (and out of sight). Better quality flash than a USB stick, and now the limiting factor for library size is the number of tracks the car can handle, instead of storage.
I asked the sales guy about this when I bought my 2019 Subaru and he was stumped, said no one had ever asked that before. But sure enough, the car could read flash drives similar to MP3 cds.
