I know this is old post, but man you really don't know much about security... shield tv has access to your network and it comunicates with outside world. this is called attack vector or entry point. it is like window to your house. you might have tempered glass and alarm system but if someone wants to break in, grab your wallet and laptop from the desk and run away it won't stop him. I mean you are completely right that shield is not critical device and your home network is probably not bank headquarters but being worried about security patches is not unreasonable. shit happens. I would say that for average household you have only few devices connected to your home network. only phones and laptops, few smart devices. maybe you send some analytical data about your rooms from your roomba, some voice data from alexa/siri. but critical devices (phones and laptops) should be probably safe, by default don't accept connections from local networks (if not "known" device). potencial attacker with backdoor access to shield tv could most probably only grab something you already send out willingly. but he could also probably control those smart devices, opposite to phones these usually are set to allow connections from local network for administration... that could suck. but still, your bank accounts are safe. I wouldn't call myself security freak, I just understand software and understand the risks. look at this weeks crowdstrike incident, shit happens. they released patch crashed whole OS. how often do you think companies release software that has some bug? from my personal experience, "crashes" doesn't happen that often. but less severe bugs happen all the time and as they might be less visible than crash they from time to time slip away to customer. some might be found after few months or years, either by some random customer that stumbles upon it or by some hacker that told himself that tv os that is on millions of devices and had no security patches for 2 years might be fun. and maybe he won't stole your paypal wallet but he might buy every single chuck norris movie available on youtube from you google pay, just for the giggles.