The lure of an extended warranty is "I am going to get something for nothing. Somebody else will take care of me." 15%, of warranty buyers win. 85% lose. Not good enough odds for me. Just like at a casino, you hear all about the winners.
What if your furnace breaks and you have all your money in an extended warranty you probably won't use? If you financed your warranty, you're the warranty company's best friend. They got you coming and going.
The only thing that I can think of that is possibly worse than having an expensive vehicle full of low bid, Chinese electronics, is one with a bunch of air lines. You ask anybody who drives an old semi. They are all full of air leaks.
And I don't buy stuff with a bad reputation that is expensive to fix. If you're making money with that vehicle, ok.