Now that cars are more like phones, it might be wise to look at them the same way as far as "upgrades"....after a few years go by, it's time to get a new one, no matter what condition the old one is in.
Except it is highly unaffordable to do so...unless you hit that big PowerBall tonight...
I priced the identical Denali to what I have today, and the sticker is $9k more than what mine was in Feb 2022. Then because you are forced to now take RSE if you want advanced tech, you gotta add $1.995k for the screens in the rear seats. So thats now $11k on the sticker; you could argue this is an enhanced feature...but you can't ditch it...so its $2k stuffed on you.
Add to that interest rates have almost 3x'ed since then. When I purchased, they gave me 1.9% for 72 months...so I left my cash invested and used theirs...and am laughing all the way to the bank on that right now...
Until pricing gets back in line...not sure an annual "Upgrade" is really workable for most people.
But this is all off topic of Extended Warranty.
I still maintain, if the buyer takes the cost of the extended warranty (service contract), and invests it in a high yield savings account (can easily get one that is risk free for 4.5-5.5%), on the whole, the population will be money ahead vs. buying a service contract....it has to be this way -- or the service contract people would be out of business....
You might get burnt on a single car, but if you take this strategy over your lifetime of buying vehicles, you begin to approach the same population statistics as the general populous...and you will be money ahead over your lifetime...You have to have discipline to do the initial thing...even if you don't have cash on hand and are inclined to finance the service contract too, if instead you put the delta of the car payment monthly in the same high-yield savings...you will be ahead over your lifetime!
My Personal Experience on my 2013, which I purchased in November of 2013, put 116k miles on, and traded in Feb of 2022 was that I had $1950 in
non maintenance repairs that would have been covered by a service contract...I did follow the "severe" maintenance schedule, because I tow often...the key repairs were:
1 Magnaride Shock
1 Rear Auto Leveling Compressor
1 Yaw Sensor
1 Broken Front Sway Bar link, had them replace both when doing it, cause the parts are cheap, and required an alignment after regardless.
All repairs were at my Chevy dealer...
YMMV