Wintry wheels on only one axle ??

Hello, I’ve been driving winter bikes on my cars for more than 30 years only on one axle and never had any problems with my driving behaviour – I would even need my winter bikes!!!! I live in the south-west of Germany and we rarely have snow. The trip to work is only 10km and that via a busy federal road, which is always snow-free tomorrow. My car is a Opel Astra with a Froont drive and a very good F Behavior – even in snow!! Do I still have to buy 4 winter bikes according to the new law?? Did 2 winter bikes also apply as “winter tires”? Write your opinion Thank you TOM