It's not just with electronic gear.
Viking has a big % of the kitchen stoves business in newer high end homes. In 2000, we bought a Viking Stovetop 4 burner unit for about $1000. Due to the Center Island placement (difficult to vent through the roof or a sidewall), we needed a $850 downdraft vent that is an aluminium panel that goes up and down right behind the stovetop. Under the house in the crawlspace is the 10" diameter aluminum tubing that leads about 20" to the fan/blower that sucks the smoke out into the back yard. OK, fine, our decision to put the stove in the center of the kitchen.
One year ago, the downdraft unit stopped going up and down. Diagnosis: NEW control unit, $450 to buy and install. OK.
Sears repair comes out, and guess what? VIKING DOESN"T MAKE THE CONTROL UNIT ANYMORE. It is only frickin' 8 years old. Viking says they support parts for 7 years past last production date.
OK, so I have to buy a brand new $1,100 downdraft. Guys comes out to install it, and it doesn't communicate with the $350 fan/blower already installed on the outside of the house. So I have to buy a new blower too for $350. Plus install I'm at $1,900 for a $450 repair job.
Bottom line is that Viking downdrafts have become $1,900 disposable units (including install) only supported for 7 years.
We decided we can wait to replace the whole thing while I try to somehow find a used control unit for my downdraft even though it is no longer sold by Viking directly.