Earlier quoted context omitted.
If it's icy there's no difference at all. The only tyres that do anything on ice are the ones with spikes or chains. If it's snowy a good modern all weather tyre can hold its own, but will brake a few feet later than a good winter tyre. In all other conditions a good all weather is a lot better than winter tyres, and pretty close to a good summer tyre.
You must live in Florida or be a terrible driver. The difference between winter and all seasons is very apparent.
However the difference between winter and a modern all weather (it's a different class) isn't.
And yes, we're probably terrible drivers.
I do not live in Florida. 45N, continental winters.
I'm never using winter tyres again unless society breaks down and no one shovels the roads anymore.