Just saw this on the Rick Steves forums - from someone who lives in Frankfurt -
""News just came out early this morning that the Xmas market in Rüdesheim is now canceled. My guess is that other small towns with narrow streets and lanes will do the same. Big cities are different and the markets should happen.""
https://www.wiesbadener-kurier.de/amp/lokales/rheingau/ruedesheim/rudesheimer-weihnachtsmarkt-fallt-erneut-aus_24538234