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I have not. I suspect the fridge would be a good upgrade, but probably not the others.

Even if efficiency had improved, the cap ex of replacing it would probably take a long time to pay off.

I've monitored the electricity usage of the original 30yr old fridge my house has. It uses about 980kwh a year with today's energy prices costing about $400. If I got a new generic fridge ($630) with the energy star rating of 332kwh a year, that would save a whopping $265 a year. That's a 2.5yr break even. If you get a fancy fridge costing double the price and using double the energy it doesn't make as much sense

2.5year break even seems pretty fantastic actually. I did the math on replacing my boiler and it was something like between 12-15 years to pay back.

And that's not even considering the cost of being less repairable.

I was at a mini-lecture about how to save energy in small houses, and the lecturer stated that a 10 year old fridge uses 2X the power of a modern one. For a 15-year old fridge that goes up to 3X.

I have not researched this to verify but have no reason to doubt it.