Interested to hear what brand you're switching to, and why you expect the situation to be different once you switch.
I've honestly never had a TV just randomly die on me before, which is why I never buy the extended warranties. But Vizio not selling parts for expensive TVs just doesn't sit well with me, hence the "never again".
I still remember when I bought it, I was choosing between it and a TCL. When I asked what the difference was, the guy banged on the back really hard of each. The TCL showed big white splotches when hit, the LG had no effect. He called it 'shielding', but I'm not versed enough to know if that's a thing.