Is support the only reason people choose Oracle databases over something free like MySQL or Postgres?
Here are some reasons (things I used in past): - ASM - DataGuard - FlashBack Query - RAC - PL/SQL (the worst language ever but very useful for building packages inside database) - Window Functions - Transparent Data Encryption - online reorg - RMAN and online backup Oracle as a company is terrible. But Oracle RDBMS is a mean machine. Do not underestimate it.
Actually it is way better than the open source alternatives, but maybe my likeness for Ada makes my opinion biased