@haraldkliems though not in a very cold area, something I like about having an ebike is that dressing is even easier because you don't need to calculate whether you'll overheat going up a hill and have to take layers off, or dress slightly cold at the start of a ride. I don't think I own any cycle-specific clothing, just clothes (including some handy climbing jackets).
@jroper I'll cover over/underdressing soon, but I appreciate the note that riding an e-bike changes things! I don't have winter e-bike experience