That's not good news! I'm going to have to investigate the options on the outback. I hate putting on chains but have no problem buying some for the gnarly days just to be safe. Snow tires would be a bit more of a hassle logistically since unlike chains, they don't stow easily for the drive back to Florida. Maybe I can find a used set that fit our Outback and then sell them cheap at the end of the season.
You might want to check out Autosocks rather than chains. Much easier to use than chains if you think you might only have occasional usage. And they are approved in Colorado to meet chain laws.
They will wear out faster and have similar speed issues to chains. But you won't have one just snap and the ride is smoother/quieter.