As someone who recently lost her 25-year-old toaster oven, I understand the conflict you feel when it comes to replacing long loved and well known equipment. Mine finally had to go when it didn't turn itself off after toasting some bread in the morning and when I came home several hours later that corner of the kitchen was pretty hot. I was amazed it hadn't started a fire.
And no I don't have a great kitchen. I have a lousy electric stove and a 22-year-old toaster oven.
Have you thought about replacing it? Have you started to notice it malfunctioning? Please don't wait too long, it may not be a great kitchen, but you don't want it burned down.
Oh, an actual question... hmm... Do you think having an emotional attachment to pieces of kitchen equipment is common? normal? worthy of a support group?