> The easiest seems to be to just point it at a S3 bucket, but given most people have infrastructure on AWS (off-premise means off-premise) having other options supported out of the box is pretty handy.
Minio is great! I use it! But spinning up and managing yet another service when you're already a small shop adds more barriers to entry. Maybe find an already s3-compatible store (like Wasabi) or find something cheap and easy to spin up that's supported by the tool (like https://www.hetzner.com/storage/storage-box)
Sure, having other options is good: https://min.io/