This is something I think about a lot.
If you aren't making physical copies of your music, I think you really should. Not just in burning CDs or whatever, but also in notation (and MIDI) so that the music can be re-created in the future if you lose the recordings.
It has been noted in the 21st Century, that future generations will likely have no photographs of us, because no one develops physical photographs anymore. Facebook and Instagram are already no longer the monolithic media platforms they once were, as "alternative" platforms like Gab, Bit Chute, etc. are seeing record growth. In short: Facebook and Instagram will probably not be around in the future.
But this is where, alongside SIM cards, where the bulk of the photos we take now are. What this means is that, in the future, your grandkids may not be able to find a single photo of you from your adult life. The SIM cards are long gone; the websites either offline or passwords to accounts long forgotten.
The same is true of a great deal of music written over the last 40 years, at least. It's all digital. Many, many songs that people have written (especially over the last 15 years) exist entirely in cyberspace. It only exists as "backups" on HDDs which can and will eventually fail, on Box or Mediafire accounts that won't be around eternally, and no physical transcriptions of it exist.
What this also means for us is that, you could be this really great musician and composer, but in 60 years? Your descendants may be completely unable to hear anything you ever made, over the course of your entire life. As if you never existed at all.
Burn CDs, make cassettes, make sheet music, and many copies of it.