I'm using seaweedfs for a single-machine S3 compatible storage, and it works great. Though I'm missing out on a lot of administrative nice-to-haves (like, easy access controls and a good understanding of capacity vs usage, error rates and so on... this could be a pebcak issue though).

Ceph I have also used and seems to care a lot more about being distributed. If you have less than 4 hosts for storage it feels like it scoffs at you when setting up. I was also unable to get it to perform amazingly, though to be fair I was doing it via K8S/Rook atop the Flannel CNI, which is an easy to use CNI for toy deployments, not performance critical systems - so that could be my bad. I would trust a ceph deployment with data integrity though, it just gives me that feel of "whomever worked on this, really understood distributed systems".. but, I can't put that feeling into any concrete data.

Overall great philosophy (target at self-hosting / independence) and clear and easy maintenance, not doing anything fancy, easy to understand architecture and design / operation instructions.

  garaged:
    image: dxflrs/garage:v2.2.0
    ports:
      - "3900:3900"
      - "3901:3901"
      - "3902:3902"
      - "3903:3903"
    volumes:
      - /opt/garage/garage.toml:/etc/garage.toml:ro
      - /opt/garage/meta:/var/lib/garage/meta
      - /opt/garage/data:/var/lib/garage/data

While I loath the moves to closed source you also can't fault them the hyperscalers just outcompete them with their own software.

I don't expect free shit forever.

Just be honest since the start that your product will eventually abandon its FOSS licence. Then people can make an informed decision. Or, if you haven't done that, do the right thing and continue to stand by what you originally promised.