> Several comments mention the data immutability of Datomic as a plus and I just wanted to say you can totally make a plain-old-RDBMS table append-only and get

> Several comments mention the data immutability of Datomic as a plus and I just wanted to say you can totally make a plain-old-RDBMS table append-only and get those benefits. I'm sure this is commonly done. Absolutely, you can also store an append-only log to a txt file on disk and have your API backend recreate the "current" data from that append-only log. I guess people mentioning as a plus as it's out-of-the-box default behavior for temporal databases like Datomic or XTDB, where they are optimized for these type of queries with years of work done on it. Just as a fun aside and only slightly related: I discovered the other day that MariaDB supports (bi)temporal tables out-of-the-box too! Probably the only (FOSS) SQL database that does so? https://mariadb.com/kb/en/temporal-tables/ https://mariadb.com/kb/en/temporal-tables/