Looking for durable dishwasher

I doubt the tiny amount of sodium in the water is creating the corrosion. Fact is, we use softened water in industrial boilers to increase their life, not so they corrode faster.

The racks will corrode once the coating is broken. The coating will be broken for a few reasons: defective to start with, a low quality coating that becomes dry and brittle, abuse when loading or unloading the racks, plain old wear and tear over the years. At 7 years, it is reaching the point where the racks on any brand or type may start to corrode.. Depends on use and care too. Once it starts, little will stop it no matter what type of water you have.

Why do you say it is on its last legs? If it still washes well, it may be best to invest in a couple of racks instead of a new machine.

You got a corrosive environment buy something with the most stainless inside. And how old are you? You want a dishwasher to last the rest of your life, good luck unless your 70-80 yrs old.

DONT BUY A BOSCH! They are service piggies. although they are the quietest, and wash great.

mine is broke again and debating on wether to replace it, 3rd failure in 3 years

I've gotten excellent service with Kenmore/Whirlpool appliances. I don't think you need stainless particularly, a plastic tub will last forever and the white color makes it easier to see stuff when loading and unloading.