> Why are you worried about license fees as a developer?
Lots of developers are involved to some extent in financial decisions. And in any case, I'd be worried about losing my job because Oracle had bankrupted my employer..
> Seriously speaking, start with Oracle SE2. It is so cheap
Postgres is free, and open source too.
> Oracle Public Cloud gives you database extremely fast
It's extremely unlikely that devs will want to host a database in Oracle's cloud, and everything else in AWS/Azure/GCP.
> and you will never have issues with license audit
The very fact you felt the need to throw that in is exactly why people hate Oracle so much - they are absolutely infamous for screwing customers out of every cent.
> The name of "Rollback of DDLs" is "no developer access to production" and "UAT"
As others have said, it's useful for testing changes in pre-prod environments - so you can make sure stuff works before it gets to prod.
> Are you a huge fan of Vacuuming, XID Freezing, WAL optimisations etc. etc.?
This makes no sense; vacuum is automatic, and why would you not want knobs to tweak settings to your workload? Oracle has plenty, so I don't get your beef here.
> The MVCC in Postgress, in my view (!) is joke from academia, where they had not a single DBA
I've never heard a single sole claim such a thing - do you have any sources?