I've had the same Miele HEPA vacuum cleaner for 35 years. I've replaced various pieces on it over the years. The bags are still available. It refuses to become obsolete.

I got one because it was the only reasonable model I could find with a water softener built in. It lasted a good while (~8 years) and performed well i.e. no hard water stains on dishes. After 8 years it developed a grinding noise in the recirculation pump which pointed to broken gears and a replacement which would cost in the ballpark of a new machine so I replaced it.

The design itself has some "German overfeatured" idiosyncrasies to me. Like, when the wash is done, a little stick extends out of the top of the machine pushing the door open to vent. But then, when you tug on the door to open it, you can hear a little geared motor spin and retract that stick. Just more stuff to design, add to BOM, and to break.

I’ve had to repair my Miele dishwasher several times. (Faulty heater relay, common problem with the model.) also coincidentally the spring in the door broke yesterday. Otherwise it does clean the dishes very well and it’s quiet and attractive looking.

I bought it because they have a good rep. But I’ve owned this dishwasher for 15 years and it’s still going.

My Fisher and Paykel fridge I’ve had for 20+ years and it’s never needed any maintenance whatsoever. To me that’s pretty amazing.

Generally at least some models at least used to be very reliable. Like I just discussed with my parents that their clothes washer is over 20 years old. And been in regular use without any issues or significant maintenance. That sort of lifespan isn't really expected from even premium models from most brands.

So they do have perceived quality of being more expensive but more long lasting goods.