Oracle's database is very good. If you really need it, there is no substitute. But that said, kind of like a F1 race car, you probably don't need it (unless you own an F1 race team).
It is worth checking if this is the case.
e.g. at my workplace, we're going through an Oracle->Postgres migration and it's WONDERFUL. Everything is much better now. Just from being able to have a clustered PG pair per app instead of a centralised expensive monster box.
Oracle's database is very good indeed: it takes data in, it gives it back, it does so very efficiently. But everything else about it is enough reason to look elsewhere.