Samsung does about 4 updates a year - they don't seem to consider security to be important. (It's not so much "having the latest and greatest", it's having someone hack into your device and get your passwords. Your password to Android Central isn't that critical - you can report a post made under your name, but not by you, and we can delete it. Your bank account is another matter entirely. Google issues security updates every month - Samsung saves them up for a few months before issuing one large update.)