If you go by features, there aren't many alternatives. Unless I set up a database server, I consider checksums + snapshots + compression + reflinks to be table

If you go by features, there aren't many alternatives. Unless I set up a database server, I consider checksums + snapshots + compression + reflinks to be table stakes these days. There is only one mainline filesystem that supports all of that, and it has its share of issues that are unlikely to ever be fixed, and is (probably permanently) tarnished in many users' eyes because it was pushed too early. So the question is, do we really need a second filesystem? (Yes?)