For what it is worth, I would think people actually try different things in the existing setup before they decide on doing a switch like this. It is not easy to

For what it is worth, I would think people actually try different things in the existing setup before they decide on doing a switch like this. It is not easy to pull off at all. My guess would be that if you have way more Postgres knowledge in the house, then it is more sensible to run Postgres. This also drives the amount of administrative overhead needed.