Many developers know that if you change the style.css of a theme, and then the theme gets updated, your changes will be deleted.
The traditional solution for that is creating a child theme inheriting everything from the parent theme, while changing the child theme's CSS.
But what about a case when I change the CSS of a theme from Wordpress itself, as can be done from the Wordpress customizer?
Will this CSS also be changed if the theme is updated? I would bet it won't 99.99% but it wasn't clear from any documentation I've read so far.