The sawdust in not a safety issue.
Just what is light weight but still effective on slippery driveways, parking lots or when stuck in snow.
Rarely do I need snow tires.
99% of time the M&S work very well.
But there can be times the emergency vehicle is called to perform medical transport using highways and interstates closed due to snow.
That is why I’d like to mount snow-tired wheels just for 6 inches or more of snow.
Then remove them when roads are clear enough.
I never trust any tire enough to drive faster on it unless the pavement is dry.
My routine speed on an interstate highway is 50 mph - always in the right lane.