Isn't the append-only design unsuitable for scenarios where many updates/deletes are made? If you update/delete 1GB of your 2GB database each day, then after a year the database is 365GB in size, but the live data is only 2GB.

I think the git-like features (history, merging) are very helpful for internal work, but when the dataset must be published, I think in most cases only the newest snapshot should be made available. But then the question is what format should it have...?