I've heard that the increased weight of EVs results in more tire particulate matter than ICE cars. Is that true? Probably an ok tradeoff to reduce combustions PM and brake pad PM.

Model 3s weigh about the same as a a BMW 3 series. We're talking about 100 pound or so difference.

Batteries are heavy, period.

If you selectively choose the smallest Model 3 vs the heaviest 3 Series BMW, maybe it's 100lb. If you choose models with comparative ranges, it's as much as 800lbs. That is a massive difference.

The Jaguar i-pace weights about 800 lbs more than the f-pace despite being about the same length.

The model 3 and BMW aren't really that close either depending on which model you pick.

Depends a lot on the tires. Weight is bad, of course, as are high-performance tires like those on a Tesla. Other electric cars often have rock-hard high-efficiency tires that don't shed as many particles.

I haven't heard this before - how does that work?

Tha car slows down by using its electric motor to generate electricity instead. So actual brakes are only used for really heavy breaking. I see the same effect in my PHEV which uses its electric motor to regenerate power - after a year of ownership the brake pads are like new, there is no wear on them at all.

Regenerative braking where the braking charges the battery, rather than just converting the speed into heat.