I like prologues. TWH has a short one (about 500 words) and it sets the theme for the entire novel. Without it, I would have to shoehorn in too much exposition to make the story work.
In another long abandoned novel – which I hope to resurrect one of these days – I have a single paragraph prologue which I've put in italics, a different font and in a box. Have to say, it looks pretty good. Might be bollocks, but it
looks good
Nice to see you, Grinder. How’s things?
Dee