They aren't. They remain a fringe hipster staple. Like the vinyls.
I buy cassettes and vinyl because it's a more complete sensory experience than just Spotify or MP3s. Listening to music then involves tactile feeling, not just audio. And the ritual of setting up to play a song adds something to the experience, too, even if it's more work than just hitting "shuffle" on your streaming service.
https://www.riaa.com/wp-content/uploads/2025/03/RIAA-2024Yea...