I think there's a balance. Pretty much every performance issue can be reduced to "if you don't know what you are doing, it's gonna be slow". But, there are sys

I think there's a balance. Pretty much every performance issue can be reduced to "if you don't know what you are doing, it's gonna be slow". But, there are systems that enable you to make mistakes quite easily, and there are systems that make it more difficult to make mistakes. I think these issues are often transferable to regular DBs, but you typically don't run a full-on DB on your smartphone, which has very different performance and memory footprints/limitations. It's good to take it into consideration when using DBs on mobile devices (or, consider whether you really do need a DB, albeit small and nimble like SQLite).