The first thing you need to know is Dacor only makes parts for its products for 2 years. If you need something replaced after that period, you are pretty much out of luck.

As to what broke, here goes:

Oven door handle (broke just after two years and the part was unavailable.)

Every igniter had to be replaced in the first two years.

The coil that powers the igniters. This died after the two year period, so I spent nearly 5 years lighting the burners using a lighter.
As an aside, there was only one coil powering all four igniters. If you didn't clean the range top properly and dry off the igniters, then only one would work. The Wolf has coils for each burner, so you don't have to worry about one igniter having less impedance than another.

The controller for the oven died twice. This, fortunately, was ONE part that was available past the two year period. I think they used the same board in the next model range. However, the nail in the coffin was at 6 years of age, it died again and the part was no longer available, permanently disabling the oven.

Various bits and bobs were either worn, or broken by the end.

Funny enough, the gas valves were the one thing that lasted the entire time it was in the house.