There are some anecdotal examples of people with Miele washing machines that have lasted for decades etc (... as an aside I guess we wont know about today's Miele washing machines for several more years at least ...), but in my experience paying a premium for a product more often than not just gives you an as-cheaply-made product but with a brand name you've heard of. I am very happy to pay for decent stuff, but I am not prepared to pay extra for the same quality stuff just to get a brand name.
What seems to be the biggest problem these days for me is not mechanical failures, but what can only be assumed to be software failures - things just going haywire or flashing an LED/error code and not doing what they should.
Perhaps there is some cheap capacitor that has blown somewhere, but it is often a waffly explanation along the lines of "logic board has failed" (and they are always super-expensive to replace due to it being 10 years old and not made/stocked any more etc etc). It is usually more sensible to replace a 5-15 year old appliance with a new one, rather than buying a spare part that costs 50% of an entire new appliance, (plus then you usually get the benefits of improved energy efficiency)