I’ve had rayovac and energizer NIMH batteries and those have been trashed long ago.
However I do still have a couple rayovacs, as they were lower capacity than the energizers.
I also have some old eneloop pros that still work great, but I don’t know where they are ATM lol.
Also, my brother has/had some Powerex NIMH, forget what capacity, but i know they were less than 4 years old before they got throw away because they could hold a charge.
Also i don’t know of any other decade old battery tests other than eneloops, probably because other would be trashed before then.
12 year old eneloop test: