I can't answer your question specifically about your prospective model. However, I do have a 45-year old Thermador electric cooktop that still works perfectly. But the amazing thing is, that it is still stylish and after I recently replaced some trim pieces, I think you would be hard pressed to say it looked more than a few years old(I do clean it often). It is a very well made unit but I don't know if they still are. Also, parts are very expensive.

The only thing I would caution you is that it has been reported on this forum that the Thermador burners "click" when on the simmer setting. There is nothing wrong with them, that is how they are made. Some people report it doesn't bother them at all and they don't notice it, other people report they find it annoying, and other people report they rarely use the low simmer setting so it doesn't matter.

As to Fireboat's post, unfortunately, an appliance made 45 years ago is irrelevant in today's world in judging how an appliance of the same brand is made today. But it's always nice to hear about older appliances still in working order. I wish appliances today were made so well as those from a couple of generations ago, but most reports indicate that large kitchen appliances made today will have a life of 15 years or so.