All-season tires are not winter rated. They are 3.5 season at best. True winter usage only exists in all-weather or snow tires with the 3PMS symbols.
I have some 3PMS all season tires: Michelin Crossclimate 2. So far seem to be doing well on my FWD Chevy Bolt EV. I live in Boston though and we don't often get enough snow to really need snow tires. Also I usually ride my bike when it's snowy instead of driving.
It depends. I use All Seasons in winter and have for over 40 years without issue because 9 years out of ten winter weather means 0.25” of snow one night during winter. The tenth year we might have three inches over a couple of days.