Thinking about the fact that movie Snape has a curtain fringe, or what looks like a hime cut but without the forehead part
I’m thinking that the people in charge of this decision made his hair like that for the movie so that it wouldn’t obscure his face too much…
But I like how it leaves two in-universe explanations for this: either that movie!Snape gets his hair purposefully cut like that, or that he’s growing out a fringe