Yeah, I too am unsure why anyone would think comparing a 30 year old fridge in the worst condition for testing is somehow a useful comparison in any meaningful way.
Is it really normal to want an off the line 2025 Tesla and a 1985 Lincoln Towncar with 376k miles on its second motor with a missing cat that was stolen last month for a quarter mile comparison?
I would say it would be fair to compare a new fridge with a 30 year old fridge in good working condition. And a fridge that has one of its two compressors running all the time is obviously not in good working condition.
Unless you have a fridge assembler from that same factory with the same materials also on ice, modern tools, techniques, and methods would make this an exercise in futility with regards to an apples-to-apples like-new comparison. We don’t even use CFCs anymore, for one.
You're sidestepping the point with valid re-herrings.
If the old refrigerator's compressor hardware were left unchanged, possibly repairing the thermostat or contactor causing the malfunction, cleaning the air exchanges, and replacing the seal: based on the OPs own usage chart would have consumed equal if not less energy noting it was a dual compressor model.
Are we making an accurate comparison considering the internal cooled space of older fridges versus newer ones? Many older refrigerators were smaller, so the same power consumption for a smaller internal volume isn’t telling the whole story, but I digress.
If the comparison is meant to show the drop in efficiency as part of age and usage, then yes.
However, if you wanted to _only_ compare design upgrades, you don't want wear and tear to confound the results.