My guess is we get far less cases of minor security breaches "my computer has a virus and I lost some files" but occasionally suffer massive scale data breaches. For example "somebody got into my facebook, bank and dropbox and has stolen my identity".

The amount of software that is being automatically downloaded , installed and executed every day on millions of devices from a handful of "trusted" servers is really quite frightening.

You just know that someone out there is busy trying to work out how to forge Apple certificates.