It's my oldest appliance now, almost 25 years and counting. Seems a bit old for most major appliances these days.
None the less, it's a keeper until something better comes along.
If it was made before 1993 it was made before the new Energy Star regulations came into effect.
I did not know that the door in a door option was available that far back.
If you really like I would just keep fixing it as long as parts are available.
Appliance companies make a 20 year commitment to supply parts for their products but suppliers will keep making parts for third party repair shops and parts distributors as long as it is profitable.