Oracle's been around a while and their stability and security have been battle-tested, or at least that's the perception that makes a prospective customer trust

Oracle's been around a while and their stability and security have been battle-tested, or at least that's the perception that makes a prospective customer trust them. Interesting that there are other closed-source MySQL storage engines. I wonder how big a piece of the pie (among paying or willing-to-pay users) they have compared to MyISAM/InnoDB.