Nordic studless winter tires (different from Central European winter tires so also probably different from whatever you get in the US) do give some grip on ice, while all-seasons can be nearly as bad as summer tires. https://link.springer.com/chapter/10.1007/978-3-031-66968-2_...
The government has done ongoing research on these subjects and the regulations do get renewed (e.g. some properly rated all-seasons are now allowed)
The government has done ongoing research on these subjects and the regulations do get renewed (e.g. some properly rated all-seasons are now allowed)