That 25 year old refrigerator is almost certainly very expensive to operate. Look at the energy use over time: 1990 -> 2015 saw a halving of power usage (1000 kWh/y -> 500 kWh/y) -- over a ten year lifespan with CA electricity at $0.19/kWh, that's $950 in increased energy expenditure as compared to a new refrigerator. ie it would be close to free.

http://aceee.org/blog/2014/09/how-your-refrigerator-has-kept...

For refrigerators at least, it doesn't make sense to make them robust enough to last more than 10-15 years since it's worth it to replace them over that time period. My understanding is the vast majority of refrigerators are then recycled. All those metals are valuable.