Recommends hosting postgres yourself. Doesn't recommend a distribution stack. If you try this at a startup to save $50 a month, you will never recoup the time you wasted setting it up. We pay dedicated managed services for these things so we can make products on top of them.
There's not much to recommend; just use the Postgres from your distribution's LTS repo. I like Debian for its rock solid stability.
And Postgres upgrades are not transparent. So you'll have a 1 or 2 hours task, every 6 to 18 months that you have only a small amount of control over when it happens. This is ok for a lot of people, and completely unthinkable for some other people.