In southeastern Pa there are many winters so mild that riding all year is no problem. I don’t winterize my bikes but I keep them full of treated fuel and have 2 battery tenders that are used in rotation. I wash occasionally to get the salt off. The longest I’m off the bike is usually a month or so. I’m on a DS so tires can deal with the extra debris, salt, and cinders. I check out the previous nights temps and precipitation in areas I plan on riding. Patches of snow/ice on the road that you can see are no problem but black ice is impossible to distinguish from the road surface. If the road, moisture, and air temps are questionable, I stay off the bike. With proper gear, heated grips, bar muffs, and heated insoles winter rides are quite enjoyable.