One thing I could see where this could be useful would be unit test suites where you want different sets of seed data, but you want to be sure that each test do

One thing I could see where this could be useful would be unit test suites where you want different sets of seed data, but you want to be sure that each test doesn't accidentally mutate and leak state to other tests. There are other ways to do this, but this seems like it might be a natural fit for isolating persistence changes.