PostgreSQL still doesn't have nowhere near the features of Oracle: for example, it still cannot do synchronous multimaster replication, unless one buys Vertica.

I believe the parent didn't mean the Oracle DB but Oracle MySQL. This makes the most sense as Oracle's acquisition of MySQL (Sun) was discussed before.

The described issues fit better to Oracle DB. Schemas tied to users is definitely the case for Oracle DB and MySQL isn't that hard to install.

for sure, PostgreSQL is feature complete as Oracle, however it is the best open source db that is close enough. And not everyone needs multi-master replication or automated materialize view, etc. Many feature in Oracle can be build custom via functions and store procedures in Postgres.