Correct, but RustFS is the only drop in replacement (just migrated) Garage and Seaweed are nice (didn't look into Ceph) but you have to re-ingest. RustFS was just plug and play albeit a few minor API differences.
Also Apache licensing gives some peace of mind after the musical chair license game before they finally landed on only paid AIStor offering.
Not that I know of but a lot of people took tat as a sign of extensive vibe coding and wrote Rustfs off completely. I personally installed seaweedfs, rustfs and garage at different points and plan on checking out rustfs again in the future. If anybody is interested, the most robust of them seems to be seaweed by the way.
Also Apache licensing gives some peace of mind after the musical chair license game before they finally landed on only paid AIStor offering.