Lifespan of aftermarket car alarms

Me personally I would be considering upgrading an alarm every 10 years or at least looking into what features new ones offer. The biggest thing for me is the remotes, older ones used fixed codes which can easily be copied. Now they use rolling codes which are a lot more secure as these remotes can't be cloned.
 
Also having the alarm installed properly, pretty much every car I work on that has an after market alarm fitted has the alarm stashed up above the peddles, none of the excess wiring cut off so it's very easy to reach up, pull it down and get access to it.
 
Another big thing ( for me) is the physical security. When locks are worn they are not as secure, I see a lot where pretty much anything will work in the lock, this makes it a lot easier to gain access to a car and turn the ignition. No one ever wants to spend the money to get the physical security done properly though :)

hmmm  ok thanks guys. So I wont be forking out another $1000 to replace alarms every 10 years i guess. its probably not worth it then eh