The new company got my car insurance, and when my truck insurance was due they got that too. Later that year I added my house insurance and since I was getting discounts I also added my cabin up at Parry Sound.
So the result of having a cheaper car insurance is they sold me four policy not just one.
Most people don't get in accidents and most people need auto insurance for many decades. So those lazy rich people will likely not change.
This is also assuming most people don't make many claims in insurance. (as is the base concept of how insurance works?)
I might be leaving a lot of money on the table, and I'm not even that wealthy, but it's just not worth it to me.
I can only guess that if you are rich then you don't care - it's more likely you will stay with the same insurer because it's not worth your time to be looking elsewhere.
It wouldn't be shocking that tesla drivers are expected to make fewer claims, based on the halo bias towards wealthy people.