Given there are more engineers working on MySQL now than any time in its history, I think Oracle is pretty committed to it. MySQL is about fast, OracleDB is about enterprise. A great many companies will run MySQL for things like web applications (especially those that need scale) while running the critical internal systems on OracleDB.

I don't think the MBPro/MBAir comparison is quite right. I think it's more like MBAir versus Mac Pro: it is very easy to see a single person having both of them and utilizing both of them extensively.