Plus PostgreSQL is pluggable, if you need some extremely fast KV storage or document storage or so you can use PGSQL straight, but you can also install a plugin for, say, a new table type that has that nosql speed for that specific type of data, all within the same system and no changes to your code. There is really no reason to use anything but postgresql unless you want easier and faster transparent scaling or so (and pgsql is really good at scaling now too, just has to be a bit more planned in comparison, but its vastly easier than it’s ever been before)
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