The Ultimate Riding Jacket?

A year ago, I would've never considered high vis, but I am contemplating it now, purely because I am shocked at how long it takes cars to notice I'm there on the lanes on the way home. Even with a steady light and a flashing light (bright lights!) they'll keep their high beam on until they're about 3 metres away from me.

You sure they'll change their behaviour? they always do that no matter how much you increase your visibility, to them high beam prioritised over cyclists.