Real world situation, you decide to move your database from mysql to postgresql because you're unhappy with something that oracle is doing and you want to move

Real world situation, you decide to move your database from mysql to postgresql because you're unhappy with something that oracle is doing and you want to move to a database that is completely free and open-source. Using a framework, you change the $config['driver'] from "mysql" to "postgres" and you're good to go. Without using a framework, you need to change every query your application makes. Good luck with that. If you don't have to do that because you standardized it yourself with a bunch of functions then you actually are using a framework, just one you made yourself rather than an open source one.