My mom and dad had State Farm for as long as I can remember...I had it from 1966 till 1997 when I found better coverage at cheaper rates...dropped State Farm after 31 years with them and have no clue how long my mom and dad had coverage on their vehicles, rv and home....I go with best coverage for the cheapest price...
Sometimes, the best deal isn't with the one that has been in the family for a long time. It's really hard to beat CN or GS ERS for all they do and for no more than they charge...