alt Hacker NewsThere are laws of physics you can’t hand waive away. Winter tires are really more cold temp tires. The rubber formulation is different to allow for grip in the cold and dry (tread pattern for cold and snow). As such a winter tire wears heavily driven in the summer, rubber formulation is just too soft.
For an all season that level of summer wear would be unacceptable. So a different formulation is used to improve summer wear at the cost of the winter low temp performance. You can’t have it both ways, a long wearing summer performance and good sub 40 degree grip.
Please read the studies in this thread.
Modern high quality all weather tyres are excellent in summer and winter.
Except on actual snow, where they're just ok, because of the hybrid sipe patterns, and ice, where they suck exactly as much as everything else except studded tyres (which suck on tarmac instead).