Insurance rates are determined by a fairly large set of variables that are weighted differently by the various companies. Most people think their rates are governed by their own claim rate and credit score. While those two are probably weighted highest, there are other factors like driver's ages, crime rates where the vehicle is parked, miles driven, how the vehicle is used, vehicle age, vehicle repair/replacement costs, etc. We live in a connected society and if you live where the neighbors are running meth labs that get raided frequently, or vehicles get stripped and stolen regularly you could very well be looking at higher insurance rates.
I have Progressive and my rates didn't go up when my RV was totaled with only 1700 miles on it, but they did start to go up when the manufacturer of my replacement RV went out of business. With my current RV the manufacturer is still in business and my rates declined significantly. Also, I buy all my insurance thru an independent agent who searches for the best deals every year. Progressive has been best for my RV and motorcycles, but Travelers turned out to be best for my home and car.