> Manufacturers should fit all-weather tires by default (not all-seasons) - they are decent in both summer and snow (3PMSF).

Won't happen. Tires affect fuel economy in EPA testing. Your commuter car will always come equipped with the hardest all-season or summer tires the manufacturer can source.

Manufacturers want to get maximum fuel efficiency, as another mentioned. Even if they do fit all seasons, the problem is that people run them much longer than they should. This is worse with higher efficiency EV tires which wear out faster... especially given the higher torque of electric engines, people accelerate too quickly.

A full set of tires can easily cost $1k, and we're in a country where most people barely have $500 saved at any moment.

>The average car owner seems oblivious to the different types of tires

If the benefits were truly as categorical as the internet makes it out to be then normal people would know about it.

Normal people don't care, because the difference is incremental, not categorical. An AWD SUV on all-seasons gets you 95% of the way there with a fraction of the effort, and that's the sweet spot for normal people.

i agree. i was impressed that my recent RWD crossover came fit with All Weather / M+S Rated (light snow conditions) tires