But how do you even know if it's actually higher quality. I find that expensive stuff breaks just as readily as cheap stuff in many cases. Speaking to dishwashers specifically in my rentals I've found that pretty much they all have similar flaws. The $1500 Bosch doesn't last longer or clean better than the $300 Frigidaire. What I've learned is that the best is to get the cheapest, but popular model with the decibel rating you want. Samsung Stormwash has been the best for me because the replacement parts are readily available. The cheaper models they keep changing parts every 6 months so it's more difficult to replace them.
You would find them the same way you find any good products today (word of mouth, product reviews, etc). But currently consumers don’t care so much about the longevity of any product or its repairability because throwing it away and getting a new one is the more economical choice. Manufacturers instead focus on gimmicky or useless features while not focusing on reliability. If disposing an item to a landfill is made to be expensive, then consumers will start making different choices and manufacturers will change their products to meet their needs.