My TCL starts to bootloop if it goes more than a month without connecting to the internet so it can download screensaver ads. The warranty people force me into the support gauntlet. The support gauntlet's first demand: connect it to the internet.
And if you think it stops here, I've got bad news. This is only going to get worse without strict regulation.
in any case, i'd get any claim that the tv works without internet in writing. then it becomes a warranty issue if the tv stops working
Also, software. Half the software on our computers stopped working despite not being internet related.
It was incredibly frustrating and really soured me on the direction tech is headed.
i. e. the ads on smart devices can be blocked