Not so much "optimistic" as "the way it used to be"
I've got a fridge that's nearly 30 years old that we've never had to fix anything on (other than the ice maker). I thought it died about a week ago, turns out I just accidentally turned it off (issue with the coldness dial) and it's colder than ever right now.
I've also got a 6 or 8 year old fridge that I wouldn't be a bit surprised if it needs replacing before the old one.