There’s one thing Postgres doesn’t provide. It doesn’t provide a supplier who a company can put their liability on. A supplier who can fix the problem in Postgres code and maintain it with authority.
But don’t get me wrong. Postgres is an awesome database system.
Because I suspect it does not mean what I think you think it means.
(Typically the EULA of all those non-Postgres systems are 'this is sold as is, no warranty as to suitability to your purpose, yada yada'
Often times people believe that if they're paying many monies for a support contract, that means they can relocate their liability to that company. Almost every time, that company has better lawyers / contract writers.
But don’t get me wrong. Postgres is an awesome database system.