I guess my problem when I ride fixed, esp in the bad weather, I have become a lazy fixed rider and tend to rely on using the front brake rather than my legs.
That said I have ridden over ice, you know when everything goes light, and convinced myself where I on a geared bike I would have been moving to fast with brakes to control my speed I would have been down.
Tbh the last few days I have been walking, just not worth the risk imo.