[sbuttgereit]

You mean like...

https://www.enterprisedb.com/enterprise-postgres/database-co...

It's been around for years. Earlier on PostgreSQL did make some efforts of being recognizable to Oracle users... look at Oracle PL/SQL and PostgreSQL PL/pgSQL... very similar and I recall that similarity being intentional.

Also, there is the SQL standard. Rather than supporting all vendors' syntax and features, which can change on the whim of some competitor that probably doesn't have your best interests at heart, it's better to adhere to the standard if you want the broadest applicability. PostgreSQL does exactly that with few deviations from the standard, relative to the industry as a whole. At the end of the day it's really about goals and not every RDBMS has the same goals; with PostgreSQL standards compliance is a goal.