Perhaps they were studded tyres, not winter tyres.Here's a winter tyres test from a German motorhome mag from 2022. I'll try and find the latest one. We have the conti winter tyres fitted. Last winter we were in Lapland, where it was rather cold and snowy. We didn't see any tarmac just fresh snow over compacted snow. However, not one vehicle was fitted with snow chains, just winter tyres. They were not hanging around either