Either there is something especially harsh about Finland's environment, or whatever cars they're making there are uniquely bad. That's absolutely unheard of where I live. 12 years is definitely not what I meant by "old".
Of course a sufficiently old car will be falling apart, whether it's part of the "ICE" or not - the suspension and shocks will be need to be replaced, door seals degraded or positively worthless, interior will be faded and cracking, wheel bearings fail, AC compressor goes out, various sensors fail (my favorite so far was the antitheft sensor)...when everything starts going bad, that's when I would expect the engine to be just be worn; basically, I would expect the ICE to last as long, or outlast, the rest of the car, save any issues on the left hand of the bathtub curve from manufacturing defects that should be covered under warranty. What you're saying is totally wild and alien to me. Mechanics must get a lot of business there.
If EVs are so reliable and maintenance free, why is the Tesla drivetrain warranty only 100k miles on the Model 3? That's no different than many ICE cars (eg I know Kia has the same warranty on ICE cars), and also well within the middle of the bathtub curve for an ICE car.
A thing to consider is the average means there are tons of older cars in the mix, but some new ones slowly creeping in. There are lots of cars from the 90s or even 80s driving around where I'm from. Weather can be quite unforgiving for cars here, temperature ranging from -25C(-13F) to +30C(86F) year round. Lots of salt and some types of pavement seem to be exceptionally bad for timing gears[0]. Owning a car is likely the most expensive thing a normal person can do in Finland.
I think it's fair to say, based on your own link which is about research into why timing belts are not lasting as long as everywhere else (a third to half the time!), some of this is outlier. And they note that this dust would also abnormally wear brakes, anything rotating, and the car's painted surfaces, which EVs also have.
But for the rest of it, like temperature differences...this is still going to be a major impact on EVs, and like ICE cars, it won't be just the engine you have to worry about.
As I noted upthread, Tesla has the same powertrain warranty that, say, Kia has. It isn't much of a testament to the vaunted EV reliability that the most famous EV manufacturer doesn't have more faith in their electric powertrains than Kia does in their ICE powertrains.
Of course a sufficiently old car will be falling apart, whether it's part of the "ICE" or not - the suspension and shocks will be need to be replaced, door seals degraded or positively worthless, interior will be faded and cracking, wheel bearings fail, AC compressor goes out, various sensors fail (my favorite so far was the antitheft sensor)...when everything starts going bad, that's when I would expect the engine to be just be worn; basically, I would expect the ICE to last as long, or outlast, the rest of the car, save any issues on the left hand of the bathtub curve from manufacturing defects that should be covered under warranty. What you're saying is totally wild and alien to me. Mechanics must get a lot of business there.
If EVs are so reliable and maintenance free, why is the Tesla drivetrain warranty only 100k miles on the Model 3? That's no different than many ICE cars (eg I know Kia has the same warranty on ICE cars), and also well within the middle of the bathtub curve for an ICE car.