Not quite old enough to be a "winner," we recently celebrated 23 years of togetherness with our "Radarange." It was a wedding present in January 1985. I remember being kind of pissed that it had a dial rather than a touchpad, but I got over it and I'm fine now. I recall also receiving a 3-piece set of CorningWare -- the small saucepans with the clear glass lids, ideal for microwave cooking -- as a wedding gift from a related party.
In all this time, we've only ever had to replace the lightbulb. I've been waiting -- not quite actively wishing (usually) -- for years for it to die so I can get the beast off my counter. I don't really have any plans for "all" the extra space, but when I'm over visiting the Dyson department, I can't help but browse longingly amongst the small, sleek, white, one-touch ovens (and panini grills) and dream. One can only imagine how quickly, in reality, the top of a smaller microwave would be stacked upon and obliterated with all manner of kitchen clutter.
The years tick by and it does, too. I've included a shot in situ with Cream of Mushroom soup, toaster and fridge for scale. The most unusual feature of this microwave is that the door opens from the top, like a regular oven, which means that you really wouldn't want it any higher than the countertop.