I'm a bit more confused on this one, not having seen the tech before. Isn't the DB space absurdly saturated with open source tools like this not really having m

I'm a bit more confused on this one, not having seen the tech before. Isn't the DB space absurdly saturated with open source tools like this not really having much life in them? Postgres is a multi-model db, with document/keyvalue/graph -- isn't it just pretty easy for an established player to add data model onto their platform?