I want to say that, having broken code for Oracle really isn't acceptable. The other side is that almost all new development occurs on PostgreSQL systems. Most Oracle installs are more stable development systems that integrate new changes less often. This leads to a situation where we have many developers without access to Oracle, and very possibly without time to learn Oracle.
I don't know what the answer is. Is there a way to say "this version of this package doesn't work on Oracle"? How can we get better support for Oracle development?