[bananamerica]

The customize interface is quite useful. It's probably more adequate if you don't have a huge intricate init. With time, custom.el (or init.el if you keep everything in the same file) can get difficult to manage. When that happen, a lot of people opt for something more readable and human friendly, like use-package or a distribution such as doom-emacs.

The author mentions that some things can be hard to do outside of the customize interface. That is true. When that happens, I just use the interface and then move the setting from custom.el to use-package. But that's rare, I can't remember the last time I did that.