Stakeholders of styling
But as Eric once said, every line of you CSS you write is a suggestion to the browser. That’s not how we think about CSS though. We think of CSS like a series of instructions rather than suggestions. Never mind respecting the user’s preferences; one of the first things we do is reset all the user agent’s styles.
“User agent stylesheets” are a fascinating thing to me. It does seem like, as an industry, we don’t think about them as the default styles for the user. Rather, we see them as the absolute bare minimum which we feel obliged to completely disregard and overwrite without any forethought.