Deciding what should be fixed and what adaptive is an important design decision; people often assume everything should be customized, but a lot of people do not want that.

Knowing what should be fixed and what should be adaptive or dynamic is a really important decision for you as a designer to make as you're designing these features because I think often people will assume that everything should be customized because it can. I'm very much of the opinion that a lot of people don't want everything to be customized.